Data File Files, Types, Formats, Extensions

Data File Files, Types, Formats, Extensions

Extension Name Extension Type Category Dev.Company File Format Description
.4DD File Extension 4th Dimension Database Data File Database 4D Unknown Data File saved by 4th Dimension, a software development program; stores the actual data referenced by a 4D Database structure (.4DB) file; can be compacted by 4D Developer or 4D Server using the "Compact data file" command.
.3DP File Extension 3DMark2011 SE Project File Data Futuremark Binary File created by 3DMark2011 SE, a program used for benchmarking PCs with DirectX 8; saves the system specs, a list of tests to run, and the results after running the benchmarks; allows the results to be saved and reviewed.
.000 File Extension Indexing Service Data File System Microsoft Binary File created by Indexing Service, a software component of the Windows (operating system|operating system) that creates a searchable file system index from files on the hard drive; contains data that helps Windows perform quicker searches.
.73C File Extension TI-73 Constant File Data Texas Instruments Unknown Data File used by Texas Instruments graphing calculators; stores variables such as a single number or multiple number values; can be saved and edited using TI Connect, the utility used for managing applications on a TI graphing calculator.
.73L File Extension TI-73 Data List File Data Texas Instruments Unknown Data File created by TI DataEditor, a utility included with TI Connect graphing calculator management software; saves a list of values that can be used in mathematical and plotting operations on the TI-73 calculator.
.AUX File Extension LaTeX Auxiliary File Settings N/A Text File created by TeX and LaTeX, which are typesetting standards often used to generate academic papers and other technical Documentation; contains information about a Document such as footNotes, bibliography entries, and cross-references.
.ADVS File Extension Adobe Device Central Device Set Data Adobe Systems Unknown Data File created by Adobe Device Central, a program used for testing and deploying Flash content to mobile devices; saves information about a group of mobile devices (phones, tablets, etc.) that are being targeted for Flash application deployment; can be shared between a team of developers.
.AIN File Extension Source Engine Compiled AI Nodegraph File Game Valve Unknown Game data file used by Games developed with Source, a first-person shooter (FPS) Game engine developed by Valve; stores a navigation mesh, which consists of points and connected lines that make up potential traversal paths for artificial intelligence (AI) non-player characters (NPCs), or "bots;" used for real-time navigation and movement for AI computer players.
.ACP File Extension Alfresco Content Package Backup Alfresco Software Zip File used by Alfresco, an open source Enterprise Content Management (ECM) software package; contains data exported from an Alfresco repository; includes XML metadata files and the content files, which may be Documents, Web files, images, records, or any other type of data supported by the Alfresco repository model.
.AMC File Extension Ant Movie Catalog File Data Ant Movie Catalog Unknown Data File created by Ant Movie Catalog, a program used for organizing collections of Movies, DVDs, CDs, and tapes; stores information for different Movie titles, such as the title, director, producer, year, and video format; can be displayed in HTML format for reviewing and sharing with others.
.ACF File Extension X-Plane Aircraft File Data Laminar Research Text Aircraft file used by X-Plane, a realistic flight simulator for pilots and simulator hobbyists; contains data that describes the properties of the aircraft, such as engine power, flight physics, mass properties, and limits.
.ASS File Extension Aegisub Advanced Substation Alpha File Misc N/A Text Subtitles file created by Aegisub, a cross-platform video typesetting application; stores the Subtitle text formatted using the Advanced Substation Alpha syntax; used for storing edited Movie Subtitles" title="Subtitles">Subtitles.
.ADV File Extension Ableton Device Preset File Audio Ableton Binary Settings File created by Ableton Live, an audio production program often used for creating electronic mixes; saves device presets, which act as an audio filter for generating unique sounds; can be applied to a "live set" (.ALS file) for creating low-fi, warping, or other sound effects.
.AR File Extension Unix Static Library Compressed N/A Unknown Archive of one or more files created by ar, the Unix archiver; used most often to create static libraries used by a GNU program linker.
.AOD File Extension Dynamics AX Object Data File Misc Microsoft Unknown Application object data file created with Microsoft Dynamics AX business management software; contains the Application Object Layer list; used for selecting layers of the application to modify.
.ADD File Extension Dynamics AX Developer Documentation File Misc Microsoft Unknown Application developer Documentation data file used by Microsoft Dynamics AX, a business management application; contains development help Documentation for using the program; arranged by Language.
.ABCDP File Extension Address Book CoreData Person File Data Apple Unknown Backup metadata file created by Address Book, a contact organization application bundled with OS X; contains a property list for an Address Book data card entry with information about a person.
.ASSTRM File Extension Splinter Cell Blacklist Game Data File Game Ubisoft Unknown Data File created for Splinter Cell Blacklist, a third-person shooter stealth Game; accompanies .ASS files; contains Gameplay data referenced by the Game for each level in Splinter Cell; not meant to be manually opened.
.AGD File Extension AgileGraph Data File Data AgileGraph Unknown Data File created by AgileGraph, a program that imports and visualizes data from a variety of sources including Microsoft Excel and .CSV files; contains raw imported data that can be filtered by AgileGraph; may be displayed as charts, graphs, or tables within the program.
.ACRODATA File Extension Acrobat Data File Settings Adobe Systems Unknown Data File referenced by Adobe Acrobat, a program that allows users to create and edit .PDF files; contains user settings is typical stored in the Security folder within the Acrobat User Data directory.
.AFM File Extension Adobe Font Metrics File Font N/A Unknown ASCII text-based font format developed by Adobe; stores font metric data for a Type 1 PostScript file; contains the master design of a specific font, which defines the way each character of the font looks.
.AVD File Extension Movie Edit Pro Video Information File Video MAGIX Binary Video clip data file created by Movie Edit Pro (MEP), a Movie editing program; stores a reference to a video file as well as scene detection information for the video segment; built automatically when a Movie file is imported into MEP.
.AFE File Extension Avid File Exchange File Data Avid Technology Unknown Metadata file used by Avid video editing and finishing applications; contains the information necessary for transferring digital media assets between Avid systems, such as between Avid Media Composer and Avid DS.
.CDF File Extension Computable Document Format File Page Layout Wolfram Research Binary Interactive Document created in the Computable Document Format (CDF), a Document standard developed by Wolfram Research; may contain interactive graphs and other visual materials in addition to static text and page formatting; can load visualization data on-demand from within the Document file.
.CSF File Extension Adobe Color Settings File Settings Adobe Systems Binary Color management settings file used by Photoshop">Adobe Photoshop, InDesign, and Illustrator; contains policies for color images, such as Web graphic color definitions, ColorSync colors, prepress colors for different countries, and other color settings; used for achieving color consistency between images and prints.
.CEL File Extension Affymetrix Probe Results File Data Affymetrix Text and Binary Data File created by Affymetrix DNA microarray image Analysis software; contains the data extracted from "probes" on an Affymetrix GeneChip; can store thousands of data points and may be large in file size; can be processed by software algorithms and visualized on a 2D grid as part of an overall genome experiment.
.CDX File Extension Compound Index File Data Microsoft Unknown Index of files or other data contained in a Database; similar to a compact index (.IDX) file, but the leaf nodes at the lowest level of a compound index point to one of the tags in the index.
.CKD File Extension Kubotek Design Container CAD Kubotek Unknown Precise 3D engineering data file containing models and Drawings created with Kubotek software such as KeyCreator and KeyMachinist; may include wireframes, toolpaths, and fully surfaced models.
.CCP File Extension CopperCube JavaScript File 3D Image Ambiera Unknown File created by CopperCube, a 3D app, Game, and website editing application; contains a prefabricated object that can be entered into your 3D scene; also contains links to .JPG and .PNG graphic files that create the appearance of the objects; similar to the .PREFAB Unity File.
.CAPT File Extension Capito Data File Data Linrock Software Zip Compressed data file created and used by Capito, an application used to create instructions for software; contains XML data and images, like screenshots, that make up the step-by-step instructions created by the user; can be exported to .PDF, .HTML, .DOCX, and .PPTX files.
.C3D File Extension Coordinate 3D File Data N/A Binary Data File saved in the Coordinate 3D (C3D) format, which is used for storing biomechanical information; stores three-dimensional motion capture data in a compact binary structure; used as a standard format for biomechanics data storage.
.CRL File Extension Certificate Revocation List File Web N/A Unknown Data File typically used by Web Servers and encryption software; contains a blacklist of revoked digital certificates; stores information about the certificates, such as the issuer and the revocation date; enables security administrators to block untrusted entities.
.CCLD File Extension Construction Clouds Data File Data Gabbisoft Ltd Unknown Data File used by Construction Clouds, software used by building and construction companies to manage their businesses; contains business-related information, such as subcontractor, client, staff, project, and vehicle information.
.CAR File Extension Car Explorer Data File Data N/A Unknown Data File used by Car Explorer, a program designed for viewing information about different car models; saved in the eXtensible Car Description (XCD) format, a standardized specification for storing automobile data; includes information such as make and model, year, price, physical dimensions, and related images.
.CBG File Extension ChessBase Game Moves File Data ChessBase Unknown File used by ChessBase, a program used for reviewing played chess Games; saves the data for the moves made on the chess board and can include data from multiple matches; saved as one of several files that together comprise the chess Database.
.CTX File Extension Visual Basic Control Binary File Developer Microsoft Unknown UserControl object data file created by Visual Basic development software; stores images and other binary data that cannot be stored as Plain Text; saved along with the .CTL file that defines the ActiveX control.
.CXR File Extension FMAT Plate Results File Data Applied Biosystems Unknown Data File created by FMAT 8100 HTS System, a program used to analyze human cells; contains Analysis data from scanned plates; includes the name or ID of the plate, plate row and column position, number of events in the well, and average intensity of the fluorescent events.
.CDT File Extension CD-Text File Disk Image Sony Binary Audio Disc metadata file created by disc ripping, authoring, and burning applications; contains CD-Text data, which may describe the album name and song information; often saved with a .CUE and .BIN file that together comprise the data for an audio disc image.
.CSA File Extension PNA Code Calset File Data Agilent Unknown Data File saved by Agilent PNA Code software; stands for "Cal/State/Archive" because the Calset data is archived with the state; stores data collected from measurements performed with the software.
.CBF File Extension Calendar Builder File Page Layout Tailwag Software Binary Custom calendar created with Calendar Builder, a calendar design program; includes an overall theme as well as custom borders, fonts, graphics, and icons that can be placed on each page of the calendar.
.CALIBRE File Extension Calibre Device Data File Misc Calibre Unknown Data File generated by Calibre eBook management software; written by the Calibre software onto an attached eReader device (e.g., Kindle, NOOK) when it is connected to the computer; contains information that helps Calibre manage eBook information on the device.
.CLIX File Extension CLIX Command File Data Rixstep Unknown Text File used by CLIX, a program designed to help users learn to use Unix; contains a list of Unix commands that can be run using a command-line interface (CLI); may be opened by CLIX, which allows users to double-click the commands within the CLIX data file.
.CL4 File Extension Easy CD Creator 4 Project File Data Sonic Solutions Binary File created by Easy CD Creator version 4, a program used to burn CDs; contains an archive of project settings and data files; stores a proprietary disc image that can be burned to a CD.
.CIMG File Extension CImg Image File Raster Image CImg Binary Data File used by CImg, an open source C++ template library used for processing image data; may contain data about a single image or a multiple images; supports up to four-dimensional data (one dimension scalar signals to three dimensional hyperspectral volumetric images).
.CHML File Extension Chameleon Encrypted Database File Encoded Krasbit Technologies Binary Encrypted data file created with Chameleon imaging workflow software; contains images saved with Chameleon Sports Photography, School Photography, or Identification System software; used for transferring content between Chameleon software programs.
.CHV File Extension ChView Interactive Star Map File Data ChGroup Unknown Data File created by ChView, a program used for browsing interactive star maps; stores the locations of stars in a 3D space and can also contain connectors between the stars; also includes star properties such as the name, constellation, spectra, mass, and other information; used for saving and sharing star maps.
.CHN File Extension Ethnograph Data Data Qualis Research Associates Unknown Data File used by older versions of Ethnograph qualitative Analysis" title="Data Analysis">Data Analysis software; contains data used for performing Analysis in the application.
.DB File Extension Database File Database N/A Binary Generic Database file that stores data in a structured format, typically with an arrangement of tables, table fields, field data types, and field values; can be created by various Database programs and exported into different formats, such as .CSV files; may also be imported by multiple Database programs and is used for gaming files as well.
.DAT File Extension Minecraft Data File Game Mojang Specifications Binary Data File used by Minecraft, a 3D exploration and construction Game; saved in a compressed Gzip format and may save various kinds of data, including player inventory, player position, and world information; used for saving world state information as well as for tracking player progress.
.DAT File Extension Minecraft Data File Game Mojang Specifications Binary Data File used by Minecraft, a 3D exploration and construction Game; saved in a compressed Gzip format and may save various kinds of data, including player inventory, player position, and world information; used for saving world state information as well as for tracking player progress.
.DAT File Extension Minecraft Data File Game Mojang Specifications Binary Data File used by Minecraft, a 3D exploration and construction Game; saved in a compressed Gzip format and may save various kinds of data, including player inventory, player position, and world information; used for saving world state information as well as for tracking player progress.
.DXX File Extension AutoCAD Drawing Interchange Attribute File CAD Autodesk Binary Data File created by AutoCAD, an application used for creating 3D design Drawings; may contain drawing block reference, attribute, and end-of-sequence objects; can only store a subset of information that can be saved in a .DXF file.
.DNA File Extension SnapGene DNA File Data GSL Biotech Binary Data File created by SnapGene, a molecular biology program used for analyzing DNA data; stores a DNA sequence and associated XML and binary metadata; also includes the author, a description, comments, and other written information.
.DPN File Extension Depiction Data File Data Depiction Unknown Data File used by Depiction, a mapping program used to explore and map dynamic "what if?" scenarios; contains the static information for a particular depiction, including maps, elevation, images, etc.
.DDT File Extension Football Manager Keep Player Data File Game Sports Interactive Text Data File used by Football Manager, a Game where players manage finances, rosters, and other aspects of football teams; contains Plain Text instructions that describe imports for football players and teams.
.DSD File Extension AutoCAD Drawing Set Description File Settings Autodesk Text Properties file used by AutoCAD, a CAD productivity application; contains settings for publishing a drawing to a .DWF file or to another plotter format; used for saving reusable publishing settings for different types of output.
.DSC File Extension Text Description File Text N/A Text Plain text file used by various software applications to store description information; may describe an associated software application like a readme file; may also contain data parameters or other types of Plain Text information.
.DRF File Extension VIZ Render File 3D Image Autodesk Binary Discreet Render Format (DRF) file created by VIZ Render, a program included with older versions of Autodesk Architecture; saves a rendered image of buildings or other modeled structures; can be opened in 3ds Max, but can only be created by VIZ Render.
.DCT File Extension Dictionary File Misc N/A Unknown Data File used by various dictionary, translation, or word Processing Applications; typically contains a list of words and may also include definition or translation information; often used for spell-checking and may be available in different Languages.
.DEF File Extension Module-Definition File Developer N/A Unknown Lists the exports and attributes of a program to be linked by an application linker; used in software development when creating a DLL.
.DWI File Extension Dance With Intensity Song File Data N/A Unknown Song data file for Dance With Intensity (DWI), a PC version of Dance Dance Revolution (DDR); includes song data, background Animations, and arrows that move with the rhythm of the song; supported by StepMania and other PC dance programs.
.DVD File Extension DOS Device Driver System N/A Unknown Driver for devices used with MS-DOS; enables communication between the operating system and the hardware device; may be preinstalled with Windows or may need to be installed from a disc that comes with the hardware.
.DEMO File Extension Pokémon Type Wild Data File Game N/A Unknown Game data file used by Pokémon Type Wild, a fan-made Pokémon fighting Game; stores asset information, such as playable characters, title screens, and menus.
.DEVELVE File Extension Develve Data File Data Develve Text Data File created by Develve, a software application used for statistical Analysis; stores data that can be viewed, analyzed, interpolated, and summarized in the software; can also be used for storing sample size data and DOE matrices.
.DSX File Extension DAZ Studio XML File Settings DAZ Productions XML Data File used by DAZ Studio, an application used for 3D character modeling; uses XML Format">XML Formatting and can save several different types of data for the application, including user workspace layouts and other user interface settings.
.DRZ File Extension PyDrizzle Data File Data Space Telescope Science Institute Binary Data File created by PyDrizzle or MultiDrizzle--programs used for processing ACS and WFPC2 Hubble Space Telescope (HST) space photograph data; stores a "drizzled" image, which uses reconstruction techniques to fill undersampled areas of the image; used for creating quick-look mosaic images of space data; used in scientific space research.
.DATA File Extension Analysis Studio Offline Data File Data Appricon Text Data File used by Analysis Studio, a statistical Analysis and data mining program; contains mined data in a Plain Text, tab-delimited format, including an Analysis Studio file header; commonly used to store data for offline Analysis" title="Data Analysis">Data Analysis when not connected to an Analysis Studio Server, but may also be used in online mode.
.DA2 File Extension Ad-Aware License File Misc Lavasoft Unknown License file used by Ad-Aware, a spyware detection program; contains software registration information; used for authenticating and activating a user license for a specific version of the software.
.DHT File Extension GAUSS Data Set Header File Data Aptech Text Data File written in GAUSS, a statistical package used for processing matrices; saves header information for a dataset stored in a corresponding ".dat" file; defines field names and other metadata about the ".dat" file.
.DB- File Extension Norton Nprotect Database File Data Symantec Unknown Data File generated by Nprotect, a file recovery feature included with Norton SystemWorks and Norton Utilities; referenced by Norton Unerase when attempting to recover deleted files.
.ESM File Extension Elder Scrolls Master File Game Bethesda Softworks Binary Game data file used by The Elder Scrolls IV: Oblivion and The Elder Scrolls V: Skyrim single-player role-playing Games; contains various kinds of data, including 3D meshes, textures, video, music, sound, and Game menu data.
.ESM File Extension Elder Scrolls Master File Game Bethesda Softworks Binary Game data file used by The Elder Scrolls IV: Oblivion and The Elder Scrolls V: Skyrim single-player role-playing Games; contains various kinds of data, including 3D meshes, textures, video, music, sound, and Game menu data.
.EDI File Extension Electronic Data Interchange File Data N/A Text Data File formatted using one of several Electronic Data Interchange (EDI) standards; contains structured data stored in a Plain Text format; designed for transferring data between multiple organizations.
.ENL File Extension EndNote Library Data Thomson Reuters Binary Data File used by EndNote, an application used for managing bibliographies; contains a collection of citations, each of which store author, year, title, journal, and other reference information; can also contain links to actual publications, such as .PDF files, for viewing in the software; used as the EndNote native save and load format.
.EPW File Extension EnergyPlus Weather Data File Data U.S. Department of Energy Unknown Weather data file saved in the standard EnergyPlus format; used by EnergyPlus energy simulation software, developed by the U.S. Department of Energy (DoE); contains weather data that is used for running energy usage simulations.
.ENC File Extension Encoded File Encoded N/A Unknown Generic encoded file that may use one of several different types of encodings; helps protect the file from unauthorized use, or helps set up the file for a particular use, such as Internet transfer.
.EYETV File Extension EyeTV Recording File Video Elgato Binary Recording created and used by EyeTV, a program that allows users to watch and record live TV directly on their computer; contains a video recording of a TV program and related metadata files.
.EDF File Extension Edificius Project CAD Acca Software Unknown Project created by Edificius, a CAD program that helps users create 2D and 3D Architectural designs; contains data that describes different elements of the design such as roof material, door width, window fixture model, and balcony slab inclination; includes area views, floor plans, section views, elevation views, isometric views, terrain views and renderings of the design.
.EDAT File Extension E-DataAid 1.x File Data Psychology Software Tools Binary File created by E-DataAid version 1, a data manipulation tool included with E-Prime psychology study software; saves data in the format of rows and columns; saves participant input data during the data collection phase; can be exported to StatView, SPSS, Microsoft Excel, Compressed IFIS, and text formats for statistical Analysis.
.ECS File Extension Sony Ericsson Phone Backup File Compressed Sony Ericsson Zip Backup data file created by Sony Ericsson Mobile Phones; saved in a compressed .ZIP format that can be read by phones using the Symbian operating system.
.EBM File Extension EXTRA! Basic Macro Executable Attachmate Unknown Macro that automates processes within EXTRA!, a terminal emulation program from Attachmate; contains code with functions that can be run within the program; basic macros, such as Flag.ebm, Loop.ebm, and Captu32.ebm are included with the EXTRA! software.
.EST File Extension Streets & Trips Map File GIS Microsoft Unknown Map file saved by Streets & Trips travel and mapping software; includes street maps and locations as well as map view, style, and font settings; can also store custom routes, drawing objects, pushpins (for marking locations), and custom symbols.
.EMULECOLLECTION File Extension eMule Data File Text eMule Unknown Data File used by eMule, a peer-to-peer online file sharing program; contains a sequence of lines of text identifying ed2k (eDonkey Network) links to files; text lines include an ed2k link prefix, the file name, the file size, and a hash code to help recover corrupted files.
.EYETVP File Extension EyeTV Recording Metadata File Settings Elgato XML Metadata file created and used by EyeTV, a program that allows users to watch and record live TV on their computer; contains metadata about the associated .EYETV recording file; includes the title of the show, episode number, season number, and episode name.
.EXC File Extension eDataSecurity Management Self-extracting File Encoded Acer Unknown Self-extracting file created by eDataSecurity Management, a program used to encrypt private Documents; contains the exact same data as the source file but is encrypted in order to protect its contents; similar to the .ENX file.
.EC0 File Extension MetroCount Traffic Data File Data MetroCount Unknown Data File used by MetroCount Traffic Executive, a program that generates traffic and vehicle classification reports for traffic surveys; contains report graphs, charts, and properties such as vehicle filter settings, units of measurement, colors, speed bins, classification schemes, and statistical settings.
.EMRG File Extension E-Merge 1.x Data File Data Psychology Software Tools Binary File created by E-Merge, a tool included with E-Prime psychological study software; saves data merged from mulitple .EDAT data files; enables study participant data sets to be combined into a single file.
.EMRG2 File Extension E-Merge 2.0 Data File Data Psychology Software Tools Binary File created by E-Merge, a tool that is part of E-Prime psychological study software; saves data merged from two or more .EDAT or .EDAT2 data files; used for combining study participant data sets into a single file.
.ECC File Extension dvdisaster Error Correction File Data dvdisaster Binary Data File created by dvdisaster, a program used for recovering errors in CDs, DVDs, and Blu-ray discs; stores data used for reconstructing unreadable sectors on a disc; requires an error-free disc or .ISO disc image to generate the error correction data.
.EIX File Extension Metin2 Game Data File Game Ymir Entertainment Unknown Data File used by Metin2, a Massively Multiplayer Online Role-Playing Game (MMORPG) that takes place in an eastern fantasy world; may contain level data, 3D objects, sounds, textures, scripts, and other data used by the Game.
.EEP File Extension EEPROM Data File Data N/A Unknown Data File that stores information on EEPROM (Electrically Erasable Programmable Read-Only Memory) media, such as flash memory; contains data in a hexadecimal ("hex") format, which defines what contents of the memory device; can be edited with a Hex editor or a programming application like PonyProg.
.ESE File Extension Millions Email Generator Email List File Data Encrypt4all Software Binary Data File used by Millions Email Generator (MEG), a program used to generate email addresses for advertising campaigns; contains text syntax that can be used for generating millions of email addresses; often contains common first and last names.
.FMV File Extension FME Desktop Viewspace File GIS Safe Software Binary GIS data file used by the Universal Viewer program included with the FME Desktop application suite; stores settings for importing and converting spatial data; used for saving the "viewspace" of a collection of datasets.
.FDT File Extension Final Draft 5-7 Template Text Final Draft Binary Template created by Final Draft, an application used for authoring Movie, television, and stage play scripts; saves the default Document text and formatting for creating a new .FDX Final Draft Document; allows multiple scripts to adopt the same structure.
.FRG File Extension Sony Sound Forge Pro Project File Audio Sony Binary Audio project created by Sound Forge Pro, a Digital Audio editing program; contains a multi-track project, which references audio data files and stores editing information such as EQ, fades, reverb, distortion, and delay.
.FD File Extension LaTeX Font Definition File Settings N/A Text File used by LaTeX, a typesetting system used to create formatted Documents; contains a font declaration that maps LaTeX font properties to TeX font specifications; used to describe how LaTeX font attributes are Translated into TeX fonts.
.FOP File Extension InfoZoom Protected Data File Data humanIT Unknown Locked data file exported by InfoZoom, a data visualization program; contains table data and information about the table structure, Data Formats, permissions, etc.
.FSM File Extension Farandole Composer WaveSample File Audio N/A Unknown Sample format used by Farandole Composer, an older music tracking program
.FCZ File Extension Compressed Poser Face Pose File 3D Image Smith Micro Unknown Compressed face pose data file used by Poser, a 3D character modeling program; includes morphing data for facial poses, which may be used to modify character expressions and phonemes.
.FF File Extension Call of Duty 4 Fast File Game Activision Binary Game data file used by Call Of Duty (CoD) first-person shooter Games, including Call Of Duty 4: Modern Warfare and Call Of Duty: Black Ops; saves various Game data that are loaded during Gameplay.
.FST File Extension FL Studio State File Settings Image-Line Unknown State file created and used by FL Studio, a music production application that enables users to compose arrange, record, and edit music; contains generator, mixer, and effects presets along with channel settings.
.FLD File Extension YSFLIGHT Field File Game YSFLIGHT.com Text File used by YSFLIGHT, a flight simulation Game; saves the layout for an airfield and may include landing strips, towers, taxiways, and other airfield features; also stores a reference to the terrain data file; used for storing a Game map data.
.FFO File Extension Adobe Photoshop File Information File Data Adobe Systems Binary Metadata file created by older versions of Photoshop">Adobe Photoshop; stores file information such as the author, title, keywords, captions, categories, credits, and history; allows users to track file information.
.FLAM3 File Extension Fractal Flames File Data N/A XML Data File containing parameters used for auto-generating fractal images and Animations called "flames;" can be used as an alternative to the more common .FLAME extension; saved in an XML Format">XML Format and must be rendered by a software program before viewing the resulting image or Animation.
.FOLX File Extension Folx Download File Data Eltima Software Binary File created by Folx, a download manager for Mac OS X; contains a bundle of data files that specify information about a download; includes the download URL, the date, download time elapsed, and other download information; used for beginning and resuming downloads.
.FBRB File Extension Battlefield Bad Company 2 Data File Game Electronic Arts Binary Game data file used by Battlefield Bad Company 2 (BFBC2), a first-person shooter Game set in a modern warfare environment; used as the container format for Game data and can include various kinds of Game data.
.FNBK File Extension Food Network Recipe Manager Data File Data Nova Development Binary Data File used by Food Network Recipe Manager, a program used for organizing cooking recipes; contains recipe data provided by the program; used as an application support file for storing cookbooks.
.GPX File Extension GPS Exchange File GIS N/A XML GPS data file that contains location Data Formatted in the GPS Exchange Format; includes waypoints, routes, and tracks; uses standard XML Format">XML Formatting that can be imported and read by multiple programs and Web services; allows for the interchange of GPS data between different applications and devices.
.GRF File Extension Ragnarok Client Archive Game Gravity Unknown Compressed file archive used by Ragnarok Online, a Korean multiplayer Game; includes compressed images, sounds, and other data files loaded by Ragnarok; installed with the other Game files and are named "data.grf" and "sdata.grf."
.GPI File Extension Garmin Point of Interest File Data Garmin Unknown File used by Garmin personal navigation devices; stores the name and location of a user-defined point of interest; can be used to generate navigational routes as a destination or inter-route point.
.GPR File Extension GenePix Results File Data Molecular Devices Text Data File created by GenePix Pro Software, an Analysis program for biological experiments; saves results for an experiment conducted using a GenePix Array List (.GAL file); used for storing quantitative analyses from microarray data.
.GAL File Extension GenePix Array List File Data Molecular Devices Text Biological data file created in the GenePix Array List (GAL) format; contains the names and locations (sector, row, and column) of "features" on a on a microarray slide; used for capturing flourescent spots on Microarrays in biological experiments and can be used for quantitative Analysis.
.GSM File Extension Global System for Mobile Audio File Audio N/A Binary Audio Format designed for telephony use in Europe; optimized for recording vocal audio, such as a telephone conversation.
.GRB File Extension GRIB Meteorological Data File GIS World Meteorological Organization Binary Meteorological data file created in the GRIdded Binary format; may contain both historical and forecasted weather data; can specify temperature, humidity, precipitation, and hundreds of other factors; used for interchanging weather data between software systems.
.GMBL File Extension Logger Lite Document Data Vernier Unknown Data File created by Logger Lite, a free program that allows students to collect and Analyze Data in science and math education programs; contains columns of data such as temperature readings recorded during a scientific experiment or exercise experiment.
.GCG File Extension GCG DNA Sequence File Data N/A Text Data File created in the GCG format, a DNA sequencing format used in medical research; stores a single sequence using a Plain Text format; also contains identifying information and often a short description.
.GEDATA File Extension Qlucore Data File Data Qlucore Text Data File used by Qlucore Omics Explorer, a bioinformatics Analysis" title="Data Analysis">Data Analysis and visualization program; contains a complete data frame, including sample and variable annotations; saved in a tab-delimited text format.
.GEN File Extension Sega Genesis ROM Game N/A Binary Game ROM used by Sega Genesis/Megadrive emulators; saves a copy of the contents of an original Game cartridge and allows the Game to be played on a PC with supporting emulation software, such as Kega Fusion or Genesis Plus.
.GTP File Extension Gerber Top Solder Paste Data File Data Ucamco Unknown Data output file created by Printed Circuit Board (PCB) CAD tools such as CadSoft EAGLE; contains layout data for the top paste layer of the PCB for creating stencils to apply paste to the board; written in RS-274X, which is the most common and contemporary Gerber format.
.GGB File Extension GeoGebra Document Data GeoGebra Unknown Data File saved with GeoGebra, a free multi-platform mathematics program designed for educational purposes; may contain geometry, algebra, or calculus data that can be viewed in a graphical format with GeoGebra.
.GRADE File Extension GradeStat Document Data GradeStat Unknown Data File saved by GradeStat, a statistical program for exploratory Analysis" title="Data Analysis">Data Analysis; allows rapid investigation of large data sets; saved in a binary format that contains a data table along with optional plots, maps, and Analysis results.
.GOD File Extension Gore Game Data File Game 4D Rulers Text Game data file used by Gore Games, such as Special Edition and Ultimate Soldier; contains data in Plain Text that is referenced by the Game to describe Gameplay, such as explosions, ricochet effects, body armor, items, missions, and other level information.
.GAR File Extension Farming Simulator Game Archive File Game GIANTS Software Binary Game data file used by Farming Simulator, a Game in which players plant and harvest crops as well as manage equipment and cattle; contains Game content and is often seen with the filename DataS.gar.
.GXL File Extension Graph Exchange Language File Data R. C. Holt XML Graph data file created in the GXL (Graph Exchange Language) format, a format used for transferring graphs between software applications; stores the nodes and edges and properties that make up the graph; uses an XML Format">XML Format that allows interoperability between programs.
.GDW File Extension Jaws Unleashed Data File Game Majesco Entertainment Binary Game data file used by Jaws Unleashed, an action Game that takes after the the Movie Jaws; saved in the data folder of the Game installation and contains level information; uses names such as AQUARIUM.GDW, BEACH.GDW, and DEEPSEA.GDW.
.HCC File Extension HydroCAD Prefab Chamber Data File Data HydroCAD Software Solutions Unknown Data File used by HydroCAD, a CAD water drainage solutions modeling program; contains stormwater storage chamber parameters in plain ASCII text format; stored with several other HydroCAD files that comprise a HydroCAD project.
.HS2 File Extension HyperRESEARCH 2 Study File Data ResearchWare Unknown Data File created with HyperRESEARCH 2, a cross-platform qualitative Analysis program; contains coding information recorded from source data, including text, audio, and video files; may be analyzed within HyperRESEARCH and used to test hypotheses and generate reports.
.HCR File Extension Half-Fold Card File Page Layout Broderbund Unknown File created by Broderbund PrintMaster and American Greetings Creatacard programs, which allow users to create customized greeting cards, scrapbook pages, labels, banners, and posters; contains layout and image data for a half-fold card design.
.HCE File Extension HydroCAD Hydrograph Data File Data HydroCAD Software Solutions Unknown Data File used by HydroCAD, a stormwater drainage solutions program; contains hydrograph data using a text format; stores changes in river water flows over time for the HydroCAD project.
.HCI File Extension HydroCAD IDF Data File Data HydroCAD Software Solutions Unknown Data File used by HydroCAD, a stormwater drainage solutions modeling program; contains Intensity-Duration-Frequency (IDF) data for the rainfall intensity over a specified period of time; used in conjunction with several other data files that comprise a HydroCAD project.
.HSB File Extension HALion Sound Bank File Audio Steinberg Media Technologies Binary Audio data file used by Steinberg HALion audio sampler and Playback applications; contains a sound bank of audio samples for one or more instruments; used for distributing sound library packs and importing audio content for loops and other purposes.
.HD2 File Extension Poser Hand Pose File 3D Image Smith Micro Unknown Hand pose data file used by Poser, a three-dimensional character modeling program; includes pose data specific to character hands, such as finger positions and hand motions.
.H4R File Extension Heroes of Might and Magic IV Data File Game New World Computing Unknown Game data file used by Heroes of Might and Magic 4 (HOMM4), a turn-based strategy Game; contains data such as maps, Game music, and software updates.
.HL File Extension HeuristicLab Storage File Data HeuristicLab Unknown Data File saved by HeuristicLab, a program designed for developing and testing optimization methods; contain workbenches or problem-definitions.
.H77T File Extension MGD77T Header File Data National Geophysical Data Center Text Header file created and used by GEODAS ReFormat to MGD77T, a program used to format geophysical data into the Marine Geophysical Data Exchange (MGD77T) format; contains data that Documents the content and structure of the data contained in the associated .M77T data file; includes the survey ID, format, ship name, country platform, project funding date, and navigation instrument.
.INS File Extension Adlib Tracker Instrument File Audio Adlib Binary File created by Adlib Tracker, an audio tracking application; contains instrument samples accessed by Adlib Tracker to create compositions; file size is fixed and should not be opened.
.IMG File Extension Grand Theft Auto Data File Game Rockstar Games Binary Data File used by Grand Theft Auto (GTA) III and IV, a Game series where players complete missions in urban city environments; contains various Game data, including car and unit graphics, weapons, and other Game items; often altered to create custom Game content.
.ICURSORFX File Extension iCursor Effect File Settings GioFX Binary Data File that stores settings for an iCursor effect; used to apply special effects to the cursor in Mac OS X; can be customized by selecting iCursor → Customize Effect... within the iCursor application.
.IPR File Extension InstallShield Professional Project File Developer Flexera Software Binary Project File created by InstallShield Professional, a program used for creating InstallScript-based installation packages; contains project information, including settings, directory structures, scripts, and installer dialog settings.
.IES File Extension IES Photometric Data File Data Illuminating Engineering Society Binary Data File created in the standardized IES (Illuminating Engineering Society) photometric format; contains measurements of light and light quantities; commonly used to simulate lighting systems in buildings before they are installed.
.IMT File Extension My Time Data File Data Intuit XML Data File created by Intuit My Time, a time tracking application for Mac OS X; saves timesheet information in an XML Format">XML Format; can be imported into QuickBooks 2010 for Mac.
.IGG File Extension SuiteProfiler Color Map File Data Dana Foy Unknown Color Map data file created by SuiteProfiler, a program that allows users to create device independent color maps and then use the color maps to produce device dependent ICC color map profiles for soft proofing and image printing; can include multiple color map profiles that together comprise a suite of profiles for a given profiling environment.
.IROCK File Extension intelliRock Sensor Data File Data Engius Unknown Data File format used by intelliRock and intelliRock II concrete measurement devices; records physical properties of in-place concrete in real-time.
.I5Z File Extension IUCLID 5 Import/Export File Data IUCLID Zip Scientific Data Format used for exporting and importing data into IUCLID 5; may include several data files formatted in XML and compressed into a single .ZIP archive; IUCLID is an application for capturing, storing, maintaining and exchanging data about chemical substance properties.
.IVT File Extension International Volleyball 2006 Data File Game AddGames Italia Unknown Game data file referenced by International Volleyball 2006, a 3D volleyball Game; may include data such as player information, Game rules, actions, or graphics used by the Game.
.ICALTODO File Extension iCal To Do File Data Apple Binary Calendar data file used by Spotlight, a search utility included with Mac OS X; contains cached todo data used for searches; saved to the [user]/Library/Caches/Metadata/iCal/ directory.
.IFAITH File Extension iFaith SHSH File Data iH8sn0w Binary Data File created by iFaith, a program used for dumping .SHSH blobs and building signed .IPSW files for IOS Devices (e.g., iPhone, iPod Touch, and iPad); saves a cache of SHSH blobs dumped by the software; generally used in the process of "jailbreaking" IOS Devices.
.ICALEVENT File Extension iCal Event File Data Apple Binary Data File used by Spotlight, a search program included with Mac OS X; contains cached calendar event data used for searches; typically stored in the [user]/Library/Caches/Metadata/iCal/ directory.
.I3PACK File Extension Point Blank Game Data File Game Zepetto Binary Game data file used by Point Blank, a first-person shooter Game; includes audio data used for playing sounds and music in the background; can be extracted to the .MP3 format using i3Play.
.IS1 File Extension M3 Sakura Real-Time Save 1 File Data M3 Sakura Binary Data File created by M3 Sakura, a loader for the Nintendo DS that runs on the M3DS Real and M3i Zero flashcarts; stores the state of a Game as it is played; used for saving Game snapshots, even when the Game does not allow you to save at that time.
.ITK File Extension ScummVM Game Data File Game ScummVM Binary Data File packaged for ScummVM, a virtual machine designed for playing old adventure Games; contains data that has been reverse engineered from the original Game file; saved in a proprietary ScummVM format that can be loaded by the ScummVM engine.
.JMP File Extension JMP Data File Data SAS Institute Unknown Data File created by JMP, a program that allows users to visualize statistics created in SAS software; contains tabular data in the format of fields and records, which represent data types and values; can be created via JMP Scripting Language (JSL) scripts; may be imported and exported within SAS software.
.JOINED File Extension HJ-Split Data File Data Freebyte Unknown Data File created by HJ-Split, a program that breaks up larger files into several smaller files and then builds them back into the original file; represents the rebuilt copy of the original file but with the added JOINED file extension; can be used to transfer large data files in smaller parts, such as email attachments.
.JDAT File Extension J&ASoft Data File Data J and ASoft Text Data File used by J&ASoft Music Player, a free player for Windows; contains application data such as settings, system requirements, build dates and codes, and program version.
.JAG File Extension Jagex Data File Game Jagex Binary Game data file used by Jagex Games such as Runescape, an MMORPG; can save various data, including images, sounds, and other Game object data; stored in a proprietary format required by the Game in order to load the Game data.
.KEB File Extension Kaspersky Virus Bases File Data Kaspersky Labs Binary Data File used by Kaspersky antivirus software; stores information that helps the software detect malware such as viruses and Trojans; can be found in the Kaspersky LabAVP12Bases installation directory.
.KNO File Extension DigIN Serialized Break Model Data EvREsearch Unknown Data File created by DigIN, a program used for information management and knowledge discovery; stores a "break model," which classifies the information from a set of digital resources (Documents, Web pages, etc.) into a structure that allows patterns, relationships, and origins of data to be discovered; organizes meaning in the data by content, context, and structure, which visually comprise what is called a Borromean ring.
.LPK File Extension Tecplot Layout Package Data Tecplot Binary Visualization package created by Tecplot, a scientific visualization application; saves a plot layout (.LAY file) as well as the data required to generate the visualizations; useful for cataloging images or making large Documents.
.LRDATA File Extension Adobe Photoshop Lightroom Data File Data Adobe Systems Binary Data File used by Photoshop Lightroom">Adobe Photoshop Lightroom, a program used to organize and edit digital photos; contains image preview data supporting a Lightroom digital photo catalog (.LRCAT file); includes image metadata which enables users to browse through digital photo information.
.LMX File Extension Landmark Exchange File Data Nokia XML Data File that contains descriptive information about landmarks; contains the name, description, coordinates, address, and category of each landmark; saved in a standard XML Format">XML Format.
.LBC File Extension Cloaked Affiliate Link Builder Saved Link Web Curry K. Software Unknown Saved link data file created with Cloaked Affiliate Link Builder, a program for creating cloaked affiliate links; contains link settings such as the link text, the destination URL, the display URL, and the link title; can be used for creating both text and image links.
.LOOK File Extension SpeedGrade Look File Settings Adobe Systems Text Color corrections data file exported by SpeedGrade, a color grading program used in video production; contains a 3D lookup table (LUT) that contains all color corrections made to a video; can be applied non-destructively to video data during the editing process.
.LSF File Extension Logos Library System File Data Logos Bible Software Binary Data File used by Libronix Digital Library System (DLS), a program used by other applications for digital book management; saved alongside a .LIX file, both of which must be present to read the book.
.LIX File Extension Logos Library System File Data Logos Bible Software Binary Data File used by the Libronix Digital Library System (DLS), a software package used for digital book management; contains data for an unlocked book; saved with an .LSF file which also must be present for the book to load correctly.
.LCM File Extension Lipikar Custom Map File Data Lipikar Unknown Data File used to load or save Custom FontMaps in Lipikar, a multi-Language desktop authoring tool; contains FontMap matrix coordinates for the 255 characters of any windows bitmap font; has a fixed file size of 1.82 KB (1872 bytes).
.LIST File Extension APT List File Data N/A Text FIle created by APT, an Advanced Package Tool used to manage applications; holds a list of package sources that software can be downloaded from; contains information detailing the archive type indicating whether it contains binary or source packages.
.LCN File Extension License File Encoded Trymedia Systems, Inc. Unknown Data File created by ActiveMARK, a digital distribution service; used for secure online distribution of Games to protect from illegal sharing; only located on PCs that contain a Game using ActiveMARK secure technology.
.LOD File Extension Heroes of Might and Magic 3 Graphics File Game Ubisoft Binary Game data file used by Heroes of Might and Magic III (HOMM3), a turn-based strategy Game; stores 2D Bitmap Images">Bitmap Images for army units, terrain, buildings, and other objects; used for displaying Game graphics and animating sprite graphics.
.LRDB File Extension Photoshop Lightroom Database Developer Adobe Systems Binary Data File created by Adobe Lightroom version 1, the first installment of the photo management application; stores information about a collection of images that have been imported into the software; enables storage of organized photo data.
.LGF File Extension PMSCAN Log File Data Palmer Performance Unknown Data File generated by PMSCAN, an OBD-II scanner used for analyzing vehicle performance and diagnosing problems; supports over 220 generic OBD-II parameters and diagnostic trouble codes (DTCs); test results can be viewed in a a graph or table format within PMSCAN.
.LEX File Extension Adobe Linguistic Library Data File Data Adobe Systems Binary Lexicon data file created by Linguistic Library, an Adobe development kit used to add linguistic services, such as spelling and grammar checkers, to Adobe products; contains the shared lexicons, or words and their syntax, for a Language; used to store Language-specific data for Document validation in Adobe products.
.MID File Extension MIDI File Audio N/A Binary Standard MIDI (Musical Instrument Digital Interface) file used by music authoring and mixing programs as well as MIDI hardware devices; contains music data, such as what Notes are played, when they are played, how long each note is held, and how loud each note is played.
.MDD File Extension Point Oven Deformation Data File 3D Image Point Oven Binary Model data file used by Point Oven, a commercial suite of plugins used for transferring vertex and fcurve data between modeling programs; saves "baked" vertex data for every Animation frame of a specified mesh; allows actual vertex mesh positions, or deformations, to be exchanged between other programs that have Point Oven MDD support.
.MD File Extension Markdown Documentation File Developer John Gruber Text Text File created using one of several possible dialects of the Markdown Language; uses Plain Text formatting but includes inline text symbols that define how to format the text (e.g., bold, indentations, headers, table formatting); designed for authoring Plain Text Documentation that can be easily converted to HTML.
.MDINFO File Extension iPhone Backup Information File Backup Apple Binary iPhone Backup file created by ITunes, a digital media player; stores metadata about the data saved in a corresponding .MDDATA file; may include information about SMS messages, Contacts, and Notes; used for restoring iPhone Backups in ITunes.
.MMP File Extension Master Album Maker Project Data N/A Unknown Master Album Maker project file, which includes the album structure, text, effects, and links to all the pictures and Audio Files referenced by the album
.MMM File Extension Music Maker Arrangement File Audio MAGIX AG Binary File created by Music Maker, a music composition program; contains a multitrack arrangement comprised of music clips, transitions, and effects; can combine multiple imported audio formats into a single music composition.
.MCP File Extension CodeWarrior Project Developer Freescale Semiconductor Unknown Development project created by CodeWarrior, a C and C++ development IDE; saves references to project source code and resource files, as well as project specific preferences; originally used by Metrowerks CodeWarrior (MCP), which is now Freescale CodeWarrior.
.MTF File Extension Motorola Theme File Settings Motorola Unknown Theme file used by Motorola Mobile Phones; stores ringtone, wallpaper, and Screensaver settings and can be used for customizing the look and feel of the phone; can be created using Motorola Media Manager.
.MTW File Extension Minitab Worksheet File Data Minitab Binary Data File created by Minitab, a statistical software package used in supply-chain and quality management; contains a worksheet of data arranged as a grid of rows and columns; used to store business data and to provide input into Minitab for statistical Analysis and creating graphs.
.MDM File Extension HLM Multivariate Data Matrix File Data Scientific Software International Text Data File used by the Hierarchical Linear and Nonlinear Modeling (HLM) program for statistical Analysis of scientific data; contains textual data recorded from a scientific observation; used as an input format for the HLM program to create summary-level and in-depth statistics.
.MML File Extension FrameMaker Maker Markup Language File Page Layout Adobe Systems Text File created using the Adobe Maker Markup Language (MML); used by Adobe FrameMaker, a program used to produce and publish large structured Documents; contains formatting instructions for Page Layout, graphics, text, and other page properties.
.MML File Extension FrameMaker Maker Markup Language File Page Layout Adobe Systems Text File created using the Adobe Maker Markup Language (MML); used by Adobe FrameMaker, a program used to produce and publish large structured Documents; contains formatting instructions for Page Layout, graphics, text, and other page properties.
.MFT File Extension Kaspersky File Table Data Kaspersky Lab XML XML data file used by Kaspersky Anti-Virus and Internet Security computer protection applications; contains references to files used for scanning and detecting viruses; often contains references to .KDC and .STT files.
.MO File Extension Machine Object File Developer N/A Unknown Binary data file that contains object data referenced by a program; typically used to Translate program code; may be loaded or imported into the GNU gettext program.
.MEGA File Extension Megacubo XML Metafile Data Megacubo XML TV channel data file used by Megacubo, a program used for streaming IPTV (Internet Protocol TV) stations; saves information about the stream, such as the channel name, a description, and the connection URL; allows TV station presets to be saved.
.MEG File Extension MEGA Data File Data MEGA Team Text Genetic data file used by MEGA, an application used for testing evolutionary hypotheses; saved in a Plain Text format and contains various kinds of genetic data and sequences, such as DNA codes or genetic distance data based on populations.
.MONEY File Extension Money Data File Data Jumsoft Binary Data File created by Money, a personal finance tracking application; stores financial information for bank accounts, investments, credit cards, and other accounts; can include transactions manually entered by the user or downloaded from a financial institution.
.MWS File Extension Maple Classic Worksheet Data Maplesoft XML Worksheet created with Maple 8.x or earlier, a mathematics and modeling program; may include text, math equations, graphs, charts, and other data; saved in an interactive format that can be opened and edited with Maple.
.MPS File Extension Pocket Streets Map File GIS Microsoft Unknown Map of a certain area, such as a city or state; used on portable Pocket PC devices.
.MFL File Extension Mozilla FastLoad File Data Mozilla Binary Data File created by Mozilla products such as Thunderbird and Firefox; contains cached data for the XUL (XML User Interface Language) interface elements or the XPC components of the software; enables the program to load user interface components more quickly.
.MOL File Extension MDL Molfile Data Symyx Technologies Text Molecular data file created in the MDL Molfile format, a chemical file format; contains Plain Text information and stores information about atoms and bonds; often used as a standard exchange format for molecular information.
.MIX File Extension Command & Conquer Data File Game Westwood Studios Unknown Game data file used by the Command & Conquer (C&C) real-time strategy Games; may contain Game scenarios, Movies, music, and sounds; examples of MIX files installed with C&C Games include "conquer.mix," "local.mix," "Movies.mix," and "music.mix."
.MMW File Extension AceMoney Money File Data MechCAD Software Binary Data File created by AceMoney, a personal finance tracking application; may contain account information, transactions, investment portfolio data, and other financial information; can be used for generating in-depth or summary-level reports.
.MYO File Extension AccountEdge Company File Data Acclivity Group Unknown Data File created by AccountEdge Pro, a business accounting application; contains accounting information for a company; includes data describing accounts, sales, banking, purchases, time billing, inventory, payroll, and personalized cards.
.MNK File Extension My Notes Keeper Notebook Data Wpg Computing Unknown Data File saved by My Notes Keeper, a Personal Information Management (PIM) program; stores Notes, images, contact information, e-mail messages, URLs, and other information; includes a word processor with comprehensive text-formatting options.
.MSS File Extension Microprocessor Software Specification File Developer Xilinx Binary File used by Xilinx Platform Studio (XPS), a program used to design software for microprocessors; specifies the input/output devices, interrupt handler routines, and other software features for a microprocessor.
.MIS File Extension Marble Blast Gold Mission File Game GarageGames Unknown Contains level data for a Marble Blast Gold mission; may be included with the Game or a custom level created by a user; saved in a text format that can be opened and edited with a text editor.
.MGD77 File Extension MGD77 Data File Data National Geophysical Data Center Text Data File saved in the Marine Geophysical Data Exchange (MGD77) format; contains geophysical data in ASCII text format; includes the survey ID, date, magnetics data, timezone, observed gravity, latitude and longitude coordinates, and water depth.
.MGC File Extension Microsoft Clip Organizer Media Catalog Vector Image Microsoft Binary File used by Clip Organizer, a clip art program included with Microsoft Office; saves a collection of clip art that can be inserted into Documents or presentations; can be used for sharing groups of clip art images with others.
.MONEYWELL File Extension MoneyWell Account File Data No Thirst Software Binary Data File created by MoneyWell, a personal finance program for Mac and iOS; saves financial information for the user, such as account histories, transactions, credit card data, and loan information.
.M77T File Extension MGD77T Data File Data National Geophysical Data Center Text Data File created and used by GEODAS ReFormat to MGD77T, a program used to format geophysical data into the Marine Geophysical Data Exchange (MGD77T) format; contains bathymetry data in ASCII text format; includes the survey ID, date, timezone, water depth, and latitude and longitude coordinates.
.M3D File Extension 3D Model File 3D Image N/A Unknown Game data file that stores three-dimensional models; contains 3D objects, such as characters, buildings, scenery, and other objects that are used within the Game.
.MDT File Extension Microsoft Access Data File Data Microsoft Binary Data File used by Microsoft Access, a relational Database management system (RDBMS) for desktop computers; stores data used for the software and may include data for software add-ins.
.MNY File Extension Microsoft Money File Data Microsoft Unknown Financial data file created by Microsoft Money, a program for managing personal or business finances; may include multiple accounts, such as savings, checking, and investment accounts.
.MBL File Extension Logger Pro Data File Data Vernier Unknown Data File created by Logger Pro, a data collection and Analysis software program; may include experiments, graphs, tables, and other types of information; commonly used by students and educational institutions for conducting scientific experiments in lab classes.
.MXFR File Extension Mandelbrot Explorer Fractal Region File Settings J R Oakley XML Data File created by Mandelbrot Explorer, an application used for viewing Mandelbrot and Julia fractal images; contains the parameters for a fractal region, including the min and max X and Y coordinates, resolution, magnification, and the fractal type; used for saving a zoomed view within a fractal image.
.MCWORLD File Extension Minecraft World Backup File Game Minecraft Launcher Zip Backup file created by Minecraft Launcher, (MinecraftSP.exe) a custom application launcher for Minecraft; saves the data files for a 3D Game world and can be used for restoring a world to a previous state; not supported by the actual Game, but sometimes used by Game community members.
.MCXE File Extension MedicinesComplete Data File Data Clinical and Biomedical Computing Binary Data File used by BNF (British National Formulary) software, a platform used to deliver electronic publications; stores a "formulary," which is a electronic publication; sometimes found on standalone reading CDs, which enable users to read books and journals on medical, drug, and clinical information.
.MANM File Extension Vietcong Game Data File Game Pterodon Binary Game data file used by Vietcong, a first-person shooter (FPS) Game set during the Vietnam War; contains scripted movements for actions in the Game, such as throwing a grenade or reloading a weapon; used for storing Game Animations.
.NSQ File Extension NScheduler Data File Data Syntes Binary Data File used by NPrinting, an application used to create, generate, and distribute reports from data in the QlikView Business Intelligence application; contains data that enables NPrinting to execute Schedules, Jobs and Tasks; also stores recipient and filter data so that NPrinting can distribute the output to the appropriate users.
.NV2 File Extension NewViews 2 Database File Database Q.W. Page Associates Binary Database file created by NewViews 2 (also referred to as NV2), a Windows program used for business accounting; stores company financial information such as payroll, expenses, revenue, and transactions; used for storing and tracking company accounting data.
.NGC File Extension NeoGeo Pocket Color ROM Game N/A Binary Game ROM used by emulation software for the NeoGeo Pocket Color (NGPC) handheld Game device; saves a replica of the data stored on the original Game cartridge; used for playing older NGPC Games on a PC with emulation software.
.NYF File Extension myBase Database File Database Wjj Software Unknown Data File saved by myBase, a free-form Database system; can store unstructured text, formatted Documents, images, Web pages, e-mails, and other files.
.NAZ File Extension Total Overdose Game Data File Game Deadline Games Binary Game data file used by Total Overdose, an open world third-person shooter Game that takes place in Mexico; contains various data, such as sounds, graphics, and Game properties; can be used for adding support for multiple Languages.
.NV File Extension MAME NVRAM File Game The MAME Team Binary Game data file created by MAME arcade emulation programs; often contains Game settings and high score saved information; used for emulating the Non-Volatile RAM (NVRAM) hardware on the arcade.
.NAM File Extension Aqua3D Network File Data Aqua3D Text Data File used by Aqua3D, a program used for simulating underwater acoustic networks; saves data that initializes the network environment; includes the simulation space dimensions, node positions, signal transmission events; displays as a 3D environment in the software.
.NAM File Extension Aqua3D Network File Data Aqua3D Text Data File used by Aqua3D, a program used for simulating underwater acoustic networks; saves data that initializes the network environment; includes the simulation space dimensions, node positions, signal transmission events; displays as a 3D environment in the software.
.NBT File Extension Minecraft Named Binary Tag File Game Mojang Binary Data File format used by Minecraft, a open-ended 3D world building and exploration Game; saves data in the Named Binary Tag (NBT) format, which is a simple binary format developed to store large amounts of binary data; used for storing world, or level, information.
.NLPX File Extension NoLimits Package Game Mad Data Binary Game data file used by NoLimits, a rollercoaster simulation Game; saved within the /data/ directory of the Game installation and uses the filename convention data####.nlpx, where #### is a number.
.NS2 File Extension Lotus Notes 2 Database Database IBM Binary Data File created by Lotus Notes 2.x; contains contact list, notebook, calendar, and other information; used to store contact information and to collaborate with other Lotus Notes users.
.OFX File Extension Open Financial Exchange File Data N/A Unknown Financial data file created in the Open Financial Exchange (OFX) format, an SGML-based file format standardized in 1997 by Intuit, Microsoft, and CheckFree; can contain transactions, statements, and other financial information; used as an open format for transferring data between vendors, consumers, and financial systems; may be sent to individual users as credit card or banking statements from a financial institution.
.OSC File Extension OpenStreetMap Change File GIS OpenStreetMap Text Street map data file created in the OpenStreetMap Change (OSC) format; contains modification data for an existing .OSM street map; enables a central or existing street map to be updated with new data.
.OR6 File Extension Lotus Organizer 6 File Data IBM Unknown Data File created with Lotus Organizer, a personal information manager (PIM) designed to be used as an electronic day planner; may include a calendar, a list of Contacts, to-do lists, call records, Notes, and other information.
.ODB File Extension OpenDocument Database Database OASIS Zip File created by Apache OpenOffice Base (OOBase), an open source desktop relational Database program; formatted according to the OpenDocument standard; stores an archive of data files that comprise the Database; used to save structured information such as tables and records.
.OMOD File Extension Oblivion Mod Archive Game N/A Binary Game File used by Oblivion Mod Manager (OBMM) and Nexus Mod Manager (NMM), two programs used for applying Game mods to The Elder Scrolls: Oblivion and Fallout 3; contains the data files that alter regular Game content; saved using .7Z compression.
.OO3 File Extension OmniOutliner 3 File Data The Omni Group Unknown Data File created by OmniOutliner, a program used for organizing information; can store information using text, checkboxes, pop-up lists, and spreadsheets; used for various purposes, including note taking, tracking expenses, and creating agendas.
.OPD File Extension OmniPage Document Page Layout Nuance Communications Unknown Document created with OmniPage scanning, OCR, and page creation software; may contain images, text, and Page Layout information; saved in a proprietary format that can only be opened with OmniPage or OmniPage Professional software.
.OLK14MSGSOURCE File Extension Outlook Email Message Data File Data Microsoft Binary Data File created by Outlook for Mac, an email program first released with the Office 2011 suite; contains all email source data for a message referenced in an .OLK14MESSAGE file; loaded when viewing a specific email message.
.OGS File Extension Origons Movie Data File Data Origons Unknown Data File used by Origons, an online service that allows users to share Movie lists with each other; may contain information about DVDs, DivX video, VHS tapes, and other Movies owned by the user; allows Movie information to be downloaded and uploaded with the service.
.OR3 File Extension IBM Lotus Organizer 97 File Data IBM Unknown Data File created with Lotus Organizer 97 (a.k.a. Lotus Organizer 3) personal information manager software; contains a calendar, a list of Contacts, a to-do list, Notes, and other information.
.OR2 File Extension Lotus Organizer 2 File Data IBM Unknown Data File created with Lotus Organizer 2, an early personal information manager (PIM) program; may include a calendar of events, personal Notes, a task list, and other information.
.PKG File Extension Symbian Package File Settings Nokia Text Package created for Symbian OS devices; contains instructions that are required to create a .SIS file, including the vendor name, software dependencies, and application files to copy; stored in a Plain Text format.
.PDB File Extension Program Database Database N/A Unknown Database file used by several applications, including Pegasus, Quicken, MS Visual Studio, and Palm Pilot software; stores data in a structured format; typically installed with the corresponding application.
.PCT File Extension Picture File Page Layout Apple Binary Image stored in the Macintosh PICT format, which was developed by Apple in 1984 for storing images using Apple QuickDraw technology; contains image data in one of two formats, PICT 1, the original format that stores 8 colors, or PICT 2, a newer format that allows thousands of colors (24 and 32-bit images); supports both raster and vector images.
.PRX File Extension Windows Media Profile File Settings Microsoft XML XML file used by Microsoft Windows Multimedia programs for publishing digital video files; stores the audio and video codecs to use, as well as the target bit rates and Language; used for publishing videos with the same formatting and quality.
.PLT File Extension AutoCAD Plotter Document Vector Image N/A Unknown Vector-based plotter file created by AutoCAD drawing software; can be printed using a plotter, which prints images using lines instead of dots; based on the .HPGL format.
.PK3 File Extension Quake 3 Engine Game Data File Game Id Software Zip Compressed Game data file used by Games based on the Quake III engine (id Tech 3), which was developed by id Software; may contain maps, textures, audio clips, or other data used for Gameplay; can be modified to create custom Game content.
.PK3 File Extension Quake 3 Engine Game Data File Game Id Software Zip Compressed Game data file used by Games based on the Quake III engine (id Tech 3), which was developed by id Software; may contain maps, textures, audio clips, or other data used for Gameplay; can be modified to create custom Game content.
.PDX File Extension Adobe Acrobat Index File Data Adobe Systems Unknown Index file created by Adobe Acrobat, a Document creator and viewer program; contains an index of Documents and directories; enables the capability to search across multiple .PDF Documents; useful for businesses that use large sets of PDF Documents, such as lawyers.
.PLS File Extension MYOB Accounting Data File Data MYOB Technology Binary Financial data file created by MYOB accounting software, such as AccountEdge and Accounting Plus; contains company financial information, such as revenues and expenses; used for budgeting and tracking, as well as printing reports.
.PPM File Extension Portable Pixmap Image File Raster Image N/A Text 24-bit color image formatted using a text format; stores each pixel with a number from 0 to 65536, which specifies the color of the pixel; also stores the image height and width, whitespace data, and the maximum color value.
.PCK File Extension System Center Configuration Manager Package File System Microsoft Binary File used by System Center Configuration Manager (SCCM), an application used to administer large groups of Windows computer systems; contains an update package, which can store system and application files; used for updating client systems.
.PHY File Extension PhyMod Physical Modeling Data Audio N/A Unknown Data File saved by PhyMod, an older physical modeling software program; can create and modify electronic sounds.
.PEK File Extension Adobe Peak Waveform File Audio Adobe Systems Unknown Audio metadata file used by Adobe applications such as Premiere Pro, After Effects, Soundbooth, and Encore; contains visual waveform data used for displaying audio waveform previews on the audio track timeline.
.PMM File Extension MikuMikuDance PolygonMovieMaker File Data MikuMikuDance Binary 3D dance Animation project created by MikuMikuDance, a dance Animation program originally created in Japanese; contains model, Animation, and music settings for a 3D dance routine; supports multiple dancers in the same scene.
.PBD File Extension EaseUS Todo Backup File Backup CHENGDU Yiwo Tech Development Binary Backup file created by EaseUS Todo Backup, a Backup and restore utility for Windows; may include system or user files and can be used for storing entire disk partitions; often saved on external media or some other device that can be used to restore files in case the local computer is damaged.
.PHD File Extension PhotoDirector Project File Data CyberLink Binary Photo project created by PhotoDirector, a program used for editing digital photos; supports imported photos from many different camera RAW formats, including .DNG, .CR2, .SRF, and many others; contains the library of imported images and stores any user edits; used as the native project save format and is saved with other data files and folders that contain the digital photo data.
.PBK File Extension Dial-Up Phone Book File Data Microsoft Binary Data File used by the Network Connections utility in Microsoft Windows, which is also referred to as the Remote Access Phonebook; stores saved dial-up connection settings, which include phone numbers, logins, and passwords; can save data for multiple connections.
.POR File Extension SPSS Portable File Data SPSS Text ASCII text data file created by SPSS, a statistics processing application; stores exported data from the software in a Plain Text format, which is easily readable by other applications; used for sharing data between programs and computer systems.
.PHO File Extension MBROLA Phonetic Data File Audio The MBROLA Project Binary Audio data file used by MBROLA, a speech synthesizer used for generating speech audio in multiple Languages; contains a list of phonemes, which are the basic audible units of speech, as well as the duration for each phenome; used for generating .WAV, .MP3, or other Audio Files with human speech.
.PK4 File Extension Doom 3 Engine Game Data File Game id Software Zip Compressed Game data file used by Games that use the id Tech 4 Game engine, which was developed by id Software for Doom 3; stores Game assets, such as maps, graphics, Audio Files, or other data used for Gameplay; similar to the .PK3 format.
.PAW File Extension Pawaa File Data Pawaa Software Binary File created in the pawaaFILE format, a format developed by Pawaa Software for secure storage and transmission of files, particularly in enterprise environments; encapsulates any file with an encryption layer and a usage policy so that the file is protected from unwanted access; also enforces audit trails and expiration dates so the file has additional levels of distribution control.
.PCAP File Extension Packet Capture Data Data Wireshark Unknown Data File created by Wireshark (formerly Ethereal), a free program used for network Analysis; contains network packet data created during a live network capture; used for "packet sniffing" and analyzing data network characteristics; can be analyzed using software that includes the libpcap or WinPcap libraries.
.PCD File Extension Pure Component Data File Data ChemSep Binary Chemical data file created by ChemSep, a column simulator for distillation, extraction, and absorption operations; contains critical, molecular, EOS, T correlations, and other data for components, which include benzene, phenol, cyclohexanone, carbon dioxide, aniline, and bromobenzene.
.PVW File Extension Pronto for Windows Data View File Data Outram Research Unknown Data File used by Pronto for Windows, a program that allows users to extract data from data loggers; stores Page Layout and graphical and text formatting information of a data view.
.PLAYER File Extension Pokémon Type Wild Player Data File Game N/A Unknown Game data file used by Pokémon Type Wild, a fan-made Pokémon fighting Game for Windows; stores information about playable Pokémon characters, such as their abilities and appearance.
.PSAR File Extension PSP Update File Misc Sony Unknown Data File used to update the Sony PlayStation Portable (PSP); sometimes used for installing custom firmware updates on the PSP; can only be accessed by unpacking the EBOOT.PBP file (see the .PBP entry for more information); typically named "DATA.PSAR."
.PGDATA File Extension Penguin George Data File Data Penguin George Text Data File used by Penguin George applications, such as URL Melter and Sports Coach: Rugby; similar to a .JSON file; stores data referenced by the application for different purposes, including sending data between the Server and the client; generated automatically by the application.
.PHZ File Extension Algodoo Phun Compressed Phunlet Game Algoryx Simulation Zip Zipped phunlet created with Phun, a 2D physics sandbox application; includes the .PHN data file as well as a .PNG thumbnail image and a checksums.txt file; may be created by Phun beta 5 and later.
.POSTAL File Extension TomTom Postal Code File Data TomTom International Unknown Data File referenced by TomTom GPS navigation software; maps zip codes (or postal codes) to cities, streets, and other locations; accessed by TomTom software and should not be opened manually.
.PIG File Extension Descent Texture File Game Interplay Binary Contains textures used in the Descent 1 and 2 video Games; may also store sound effects and model data for Descent 1.
.PLF File Extension Papyrus License File Misc Papyrus Software Unknown License file used by Papyrus Live Updater, a program that registers Papyrus software products; contains license information that can be imported into the Papyrus suite of applications to register an application, module, or plug-in.
.PP File Extension Pocket Physics Sketch File Data Pocket Physics XML Data File created by Pocket Physics, a homebrew Nintendo DS application used to create and simulate simple physics scenarios; stores a sketch, which includes user drawn objects that can be animated under physical constraints.
.POST File Extension LIGHT File Data Light of Creativity Binary Data File created by LIGHT, the Web System that enables users to record, organize, and share their life experiences; saves a life fact for a user and may include images, PDFs, videos and other files.
.PPM_B File Extension Nokia PPM Flash File Misc Nokia Unknown Data File used to "flash" or rewrite the system data on a Nokia cell phone; may be used to change the Language pack installed on the phone, which can add support for other Languages.
.QUICKEN2015 File Extension Quicken 2015 Data File Data Intuit Binary Financial data file created by Quicken 2015, a financial management program; saves user data for multiple accounts, including personal information, transactions, reports, and settings; used exclusively by the 2015 version of Quicken for OS X.
.QB2009 File Extension QuickBooks 2009 File Data Intuit Binary Company data file created by the Mac version of QuickBooks, a small business accounting application; contains financial data, report definitions, letters, and a company profile; enables companies to store and monitor their financial data; used for tracking income and expenses, as well as filing taxes.
.QDFX File Extension Quicken Financial Exchange File Data Intuit Binary Data File used by Quicken Essentials for Mac, a personal financial management program; used for converting data files from older versions of Quicken into a format that can be imported into newer versions of Quicken Essentials.
.QBMD File Extension QuickBooks Backup File Backup Intuit Binary Backup data file created by some Mac versions of QuickBooks, a small business accounting application; contains an exact copy of a company data file, which may have a .QB2007 or .QB2009 extension; used for restoring financial data in the event that the original data file becomes corrupted.
.QBMB File Extension QuickBooks Backup File Backup Intuit Binary Company Backup data file created by Mac versions of QuickBooks small business accounting software; contains the Backup copy of a company data file, which may have a .QB2012, .QB2011, etc. extension; used for restoring a recent copy of the original data file in the event it becomes corrupted.
.QB2010 File Extension QuickBooks 2010 File Data Intuit Binary Data File created by the Mac version of QuickBooks, a money management application; contains company financial data as well as report definitions and letters; enables companies to store and monitor financial information; can be used for generating payroll, tax forms, and reports.
.QSF File Extension Qualtrics Survey File Backup Qualtrics XML Data File exported by Qualtrics online survey software; formatted in XML and is generated when the "Export Survey" option is selected; can be used as a Backup file and may be imported into the survey system for later use.
.QPB File Extension QuickBooks Point of Sale Data File Data Intuit Unknown File created by QuickBooks Point of Sale (POS), a business sales tracking application; may be the primary data file or a Backup file automatically created by the software; enables the business data to be saved (and restored in the case of a Backup).
.QVM File Extension Q Virtual Machine System Q Unknown Virtual machine used by Q, an operating system emulator built for Mac OS X; serves as a hard disk that can be loaded by the emulator, which allows Windows and Linux systems to run within Mac OS X.
.QB2006 File Extension QuickBooks 2006 File Data Intuit Binary Accounting data file created by the Mac version of QuickBooks, a small business accounting program; contains company financial management information, such as income and expenses; used for tracking financial data, as well as filing taxes.
.QB2005 File Extension QuickBooks 2005 File Data Intuit Binary Company accounting data file created by the Mac version of QuickBooks, a small business money management application; stores company income and expense information; used for tracking financial data, as well as for filing taxes and managing payroll.
.RVDATA File Extension RPG Maker VX Data File Game Enterbrain Binary Game data file created by RPG Maker VX (RPGVX), a software development tool used to create role-playing Games; may store various types of Game data, including maps, items, character information, and enemies; used for saving development progress while creating an RPG.
.RFA File Extension Revit Family File Data Autodesk Unknown Data File that can be loaded into a project created with Revit, a building information modeling (BIM) program; contains one or more 3D Models that can be imported into a 3D scene; may be created and saved using the Revit Family Editor.
.RAW File Extension Dolphin Wii and Gamecube Emulator Game Save File Game N/A Unknown Game save file for Wii and Gamecube Memory Card files; contains Game save data.
.RMD File Extension Reference Manager Data File Data Thomson Reuters Binary Data File created by Reference Manager, an application used for creating bibliographies; saves the references for the bibliography and is also saved with a separate .RMX index file; used for storing citations and other references.
.RMD File Extension Reference Manager Data File Data Thomson Reuters Binary Data File created by Reference Manager, an application used for creating bibliographies; saves the references for the bibliography and is also saved with a separate .RMX index file; used for storing citations and other references.
.RSX File Extension RED Metadata XML File Video RED XML Video metadata file created by RED digital camera software; saves a "look" for an .R3D Video Clip that defines how the Video Clip appears; enables perspectives to be saved.
.RADQ File Extension Need for Madness Game Archive Game RadicalPlay.com Zip Game data file used by Need for Madness, a car racing and stunts Game; saves Game assets, such as music, car physics properties, and car models; saved in a compressed .ZIP format.
.RXDATA File Extension RMXP Data File Game N/A Unknown Role Playing Game (RPG) data file created by RPG Maker XP, a software development program for creating original role-playing Games
.RCG File Extension Recog Character Recognition Set Data Recog Unknown Data File used by Recog, a program that learns and recognizes characters and symbols; contains character recognition data that enables Recog to identify mouse-drawn characters.
.RSD File Extension Rosetta Stone Data File Data Rosetta Stone Unknown Data File created for Rosetta Stone, an interactive Language teaching program; contains Language data referenced by Rosetta Stone; contained in the "data" and "speech" folders within the Rosetta Stone .ISO file on the Language Disc; not meant to be manually opened.
.RDA File Extension R Data File Data The R Project for Statistical Computing Binary File created by older versions of R, a statistical Analysis and graphing program; saves the statistical objects (functions, values) created by the user at the R prompt while the program is open; used as the older extension for R, which now uses the .RDATA extension.
.RHISTORY File Extension R History File Data The R Project for Statistical Computing Text Data File created by R, a statistical computing and graphing application; contains the history of commands entered by the user during an open R session; similar to a .BASH_HISTORY file for the Bash shell; enables the user to push the up arrow to scan through the list of previously entered commands.
.RRA File Extension vRigger Rigging Gear File CAD Iterum Unknown Data File used by vRigger, a program used for creating rope rigging system designs; saves data for a piece of rigging gear such as a pulley, carabiner, climbing harness, or another piece of equipment; used as part of a vRigger object library and can be included within a rigging system illustration.
.RIM File Extension BioWare Resource Image File Game BioWare Binary Game data file used by some Games developed by BioWare, including Neverwinter Nights and Star Wars: Knights of the Old Republic; similar to the .ERF format also used by BioWare Games; used as an Game application support file.
.RTA File Extension TrueRTA Project File Audio True Audio Binary Project File created by TrueRTA, a software analyzer used for testing audio systems; saves settings that are used for analyzing input or generated sounds; allows project settings to be recorded and used later.
.ROI File Extension Report Object Instance Data Actuate Unknown Information object used by Actuate reporting software; can pull and integrate real-time data from several different data sources
.REB File Extension REBOL Script File Developer REBOL Technologies Text Script that contains code written in the REBOL (Relative Expression Based Object Language) programming Language; can be compiled into an executable program using a REBOL compiler.
.RCY File Extension ReCycle 1.x Document Audio Propellerhead Software Binary Audio data file created by ReCycle 1.x, a program used to create audio sample loops; contains the audio data in slices, which can be stretched to match specific tempos; used for storing audio sample work.
.RPD File Extension RIB Project Database File Database RIB Software Binary Database file used by iTWO, an application suite used for construction planning and engineering; stores a Progress ObjectStore Database, which contains all data for an iTWO planning project; used as a backend storage format for iTWO.
.RFD File Extension Recogniform Form Designer File Page Layout Recogniform Technologies Binary File created by Recogniform Document recognition software; contains the Page Layout structure, text, and other formatting information; used for scanning and storing digital copies of paper forms.
.RDC File Extension IDRISI Raster Documentation File GIS Clark Labs Unknown GIS metadata file created by IDRISI Taiga, a program used for imaging spatial data; saves descriptive information about the raster image stored in a .RST file; also can store a reference to the .REF geographical reference file for the image, as well as an .SMP palette file.
.RTP File Extension Gromacs Residue Topology Parameter File Data Gromacs Text Molecular data file used by Gromacs, a program used for simulating molecular dynamics; saves residue information, which represents the base parts of a molecule; may contain atoms, bonds, angles, dihedrals, and impropers; used as a data file for molecular Analysis.
.ROCA File Extension RIB office Compressed Archive Data RIB Software Binary Data File created by RIB office, a project management application for planners and engineers; stores a compressed archive of the office project management data; includes schedules, Drawings, employee information, contract data, Contacts, and invoices; used for archiving snapshots of the Database.
.RKG File Extension Mario Kart Wii Ghost Data File Game Nintendo Unknown Data File utilized by the Nintendo Mario Kart Wii video Game; contains ghost data referenced by the Game; includes the race time, vehicle, and character.
.RDX File Extension Reflex Data File Data Borland Unknown Data File used by Borland Reflex, an early Database program developed for DOS; stores data in a flat file format.
.RF1 File Extension Retirement Forecast File Data N/A Unknown Data File used by the Retirement Forecast software program.
.SAV File Extension Nintendo DS Save File Game Nintendo Binary Saved Game created for Games on the Nintendo DS portable Game system; may include Game information such as the character name, experience points, completed levels, and in-Game resources; stores the state of the current Game progress.
.SDF File Extension SQL Server Compact Database File Database Microsoft Unknown Compact relational Database developed by Microsoft, also known the SQL Server Compact (SQL CE) format; designed for applications that run on mobile devices and desktops; contains the complete Database contents and can be up to 4GB in size.
.SBN File Extension Cisco IP Phone Firmware File System Cisco Systems Binary Firmware file, or "image" file, used by Cisco IP (Internet Protocol) phones; contains data that controls the operation of the phone; used during the IP phone firmware upgrading process; usually distributed with a few other files in a firmware package.
.SPV File Extension SPSS Output Document Data IBM Binary Data File generated by SPSS statistical Analysis software; contains the output generated from data analytics functions run within SPSS; may store datasets, reports, charts, and other visualizations; can be viewed with SPSS versions 16 and later.
.SCN File Extension OpenTTD Scenario File Game OpenTTD Binary Game File used by OpenTTD, the open source follow-on project to Transport Tycoon; saves a Game scenario, which defines the starting conditions for a map played by the user; may include the landscape, buildings, cities, train tracks, and other features.
.STX File Extension Pinnacle Studio Project File Video Pinnacle Unknown Project File created by Pinnacle Studio video editing software; contains video project settings and references to media and other data files used by the project.
.STA File Extension MAME Saved State File Game The MAME Team Binary File created by a MAME arcade video Game emulation program; contains a "frozen" state of the emulated arcade machine at a particular time during Gameplay; used for saving and loading Games.
.SCG File Extension myPM SCG Definition File Data Midori Media Binary Data File created by myPM SCG, a program used by project managers to generate "S curves;" contains SCG definitions, which specify the type of S curve to generate and an input and output file; used for creating outputs that visualize costs, labor hours, or other quantities.
.SRR File Extension ReScene Metadata File Backup ReScene Binary Archive metadata file created by ReScene, a program used to repackage .RAR files released in the Warez scene; contains a Backup of all metadata files in the RAR archive; can be combined with the original non-metadata archive files to recreate the original distribution archive.
.SLDTM File Extension SDL Translation Memory File Data SDL Unknown Data File created by SDL Trados Studio Language translation software; stores a "translation memory," which is a linguistic Database that saves translation data as a user Translates written information; includes "100% matches" as well as "fuzzy matches."
.SCA File Extension Scala Script File Executable Scala Unknown Script written with Scala, a digital signage management program; includes instructions that determine how and when digital images are displayed; used for controlling electronic billboards, dynamic digital signs, DOOH (Digital-Out-of-Home) advertising, employee TV, electronic posters, and other types of digital signs.
.SBC File Extension Office Accounting Company Shortcut File Misc Microsoft Binary Company file shortcut saved by Microsoft Office Accounting, an online banking program; stores a shortcut that points to the location of the .SBD accounting data file; commonly saved to a shared folder so multiple users can access accounting information from different computers.
.SDAT File Extension Nintendo DS Sound Data File Audio Nintendo Binary Audio data file used by the Nintendo DS, a portable Game system; contains sound files for the Game, such as .SSEQ Audio Files; used to store music and sounds that are played back during Gameplay.
.SBX File Extension GLBasic Shoebox File Compressed Dream Design Entertainment Binary Compressed archive created by Shoebox, a tool included with the GLBasic software development toolkit; can store application resources such as graphics, video, music, or data files; can be decompressed by the application at runtime to extract specific files.
.SEN File Extension SenTest Data File Data Neyer Software Text Data File created with SenTest, a scientific application used for Sensitivity testing and Analysis" title="Data Analysis">Data Analysis; contains the results of tests conducted with Sensitivity recording equipment.
.SBW File Extension US Treasury Savings Bonds Wizard File Data US Treasury Binary Financial data file created by Savings Bond Wizard, a program used to manage United States savings bonds; contains a collection of financial records, each of which include the purchase date, denomination, interest, serial number, yield, and projected values; used for tracking and calculating personal investments.
.SDV File Extension Studio DV Project File Video Pinnacle Unknown Project File created by Studio DV, a video editing program developed by Pinnacle; contains video project settings and references to media and other data files used by the project; some included settings are video and title transitions.
.SP File Extension Simplexety Parameters File Data Dipl.-Phys.-Ing. Ralf Wirtz Text Data File created by Simplexety, an advanced calculator program used for creating and evaluating mathematical functions as well as creating graphs; saves the list of functions and data and also supports storage of custom VBScript source code; can be used for storing and sharing mathematical data with others.
.SCGC File Extension myPM SCG Classic Data File Data Midori Media Binary Data File created by myPM SCG Classic, a program that integrates with Excel to generate histograms, S curves, and project statistics of the Excel data; contains one or more SCG definitions that can be modified.
.SCGS File Extension myPM SCG Starter Data File Data Midori Media Binary Data File created by myPM SCG Starter, a program used to generate histograms, S curves, and project statistics from Excel data; contains one or more SCG definitions that can be modified.
.SCGP File Extension myPM SCG Pro Data File Data Midori Media Binary Data File created by myPM SCG Pro, an application that integrates with Excel to generate histograms, S curves, and project statistics of the Excel data; contains one or more SCG definitions that can be modified.
.STC File Extension Contribute Connection Key File Web Adobe Systems Unknown Connection file created by Contribute, an Adobe program used for website development and publishing; saves the remote host, the connection protocol (e.g., FTP, SFTP, etc.) and the username; enables users to reuse connection information and distribute it among website developers.
.SBF File Extension Android System File System N/A Binary System file used by Google Android devices, such as Motorola DROID 2 and DROID X Mobile Phones; contains all phone data as it was originally configured from the factory; enables the phone to be set to the original factory settings.
.STDL File Extension Swift To-Do List Database Data Dextronet Binary Data File created by Swift To-Do List, a personal organization software used for recording to-do lists; saves a Backup of the to-do Database, and includes one or more to-do lists which can include one or more tasks; stores the description, priority, type, and due date for each task.
.SVD File Extension Roland Patch File Audio Roland Binary Audio file used by Roland keyboard synthesizers; contains "patches," which are settings that fine tune the Playback of a digital instrument; often used for storing instruments and effects; generally loaded onto a Roland synthesizer using a USB key.
.SDZ File Extension Spring Content Package Game Spring Zip File used by Games developed with Spring, a real-time strategy (RTS) Game engine; saves Game files in a compressed .ZIP format, but uses the ".sdz" extension; used for maps, graphics, computer artificial intelligence (AI) scripts (.LUA files), and other Game content.
.S2Z File Extension Heroes of Newerth Game Data File Game S2 Games Zip Compressed Game data file used by Heroes of Newerth (HON), a real-time strategy Game focused on the control of individual heroes; saved using .ZIP formatting and contains various Game data; used as the container format for storing Game resources.
.SUCK File Extension SiteSucker Website File Web SiteSucker Binary Offline website data file created by SiteSucker, a Mac program used to download websites for offline viewing; saves a list of websites that have been used for offline download; enables users to manage downloaded websites and open them on the local computer.
.SFAR File Extension Mass Effect 3 DLC File Game Electronic Arts Binary Game data file used by Mass Effect 3, a first person role-playing Game set in outer space; stores DLC (downloadable content) used for extending the Game with new content and features.
.SAH File Extension SETI@home Data File Data Berkeley Text Data File used by SETI@home or other BOINC distributed computing applications; may define user information or work units for performing calculations on the local computer; used for configuring and storing data that is sent back to the SETI@home project.
.SMP File Extension SmartMusic Performance File Audio MakeMusic Unknown Music File used by SmartMusic, a music practice application for band, orchestra, and voice; saves an accompaniment that can be used for practicing solos and other musical parts; includes the sheet music information and can be used for assessment; replaced by the .SMPX in Finale 2014.
.SSA File Extension Sub Station Alpha Subtitle File Text N/A Text Subtitle format created by a developer named Kotus; used by Sub Station Alpha, an older freeware video Subtitle creation program; still supported by some current video editing programs.
.SUP File Extension Super Project Definition File Developer Aivosto Unknown Contains a list of Super Project Data (.SUD) files; can be loaded by Super Project Analyzer, a software development Analysis and reporting program; contains references to the data files, but does not contain the actual project data itself.
.STH File Extension Lotus Domino Stash File Misc IBM Unknown Secure file that stores the password for a Lotus Domino key ring (.KYR) file; generated automatically when the Server key ring is created; saved with the same name as the key ring file; should be saved in both the Notes data directory of the client machine and the Domino directory of the Server.
.SSD File Extension WindowBlinds Skin File List Misc Stardock Unknown Text File that contains a list of skins within a WindowBlinds skin (.WBA) file; includes the number of skins and the title and filename of each skin; serves as a pointer to the corresponding .UIS and .SSS skin files.
.STT File Extension Streets & Trips Map Template GIS Microsoft Unknown Map template saved with Microsoft Streets & Maps, a consumer-oriented travel and map program; used as a starting point for creating custom maps (.EST files); may include basic map settings, as well as routes, symbols, legends, and other information.
.STAGE File Extension Pokémon Type Wild Stage Data File Game N/A Unknown Stage data file used by Pokémon Type Wild, a fan-made Pokémon fighting Game; contains information that describes stages featured in the Game, such as the background appearance and music.
.SP4 File Extension SuperCard 4 Player Project Data Solutions Etcetera Binary Data File used by SuperCard Player, an application used to execute SuperCard data Documents (.SC4 files); may contain one or more standalone applications, presentations, user interfaces, and other programs.
.SGR File Extension SimCity 4 Graphics Rules File Game Electronic Arts Unknown Data File used by SimCity 4, a city building simulation Game developed by Maxis, a subsidiary of Electronic Arts; contains rules for running specific video Game card models; used by the standard Game as well as Game expansion packs.
.SP3 File Extension Windows XP SP3 CD File Data Microsoft Binary Data File that resides on a Windows XP Service Pack 3 (SP3) installation disc; uses the filenames WIN51IP.SP3 and WIN51IC.SP3; contains data that is used for the operating system installation.
.STW File Extension StarOffice Document Template Text Oracle Binary Document template originally created by StarOffice, the predecessor to Apache OpenOffice; uses an older software file format before Apache OpenOffice adopted the newer .ODT OpenDocument format; used for writing .SDW Documents from the same template.
.STW File Extension StarOffice Document Template Text Oracle Binary Document template originally created by StarOffice, the predecessor to Apache OpenOffice; uses an older software file format before Apache OpenOffice adopted the newer .ODT OpenDocument format; used for writing .SDW Documents from the same template.
.SHFT File Extension Shift Work Calendar Data File Data Machai Apps Unknown Data File used by Shift Work Calendar, an application that helps you organize your work shift commitments; contains saved calendar data, such as labels, comments, dates, and shift names.
.SNO File Extension Starry Night Pro Data File Data Simulation Curriculum Unknown Data File used by Starry Night Pro, an application that helps users observe constellations; contains display settings for the view of the sky, constellations, planets, meteor showers, solar system, etc.
.STI File Extension StarOffice Presentation Template Data Oracle Binary Presentation template originally created by StarOffice, the predecessor to Apache OpenOffice; used for creating presentations with a similar design; often includes a pre-formatted header and footer for the title slide and content slides.
.STATS File Extension FreeSurfer Statistics File Data FreeSurfer Text Data File generated by FreeSurfer, a program used for generating brain images from MRI data; contains output data such as subcortical segmentation data (i.e., aseg.stats), cortical parcellation data (i.e., aparc.stats), and other information that can be used for generating an output image.
.SIDB File Extension iTunes Authorization Data File Misc Apple Binary Data File used by ITunes, a Multimedia Playback application; saves authorization information for the computer so that the user can play purchased songs for his or her user account; similar to .SIDN and .SIDD files; not meant to be opened manually by the user.
.SCRESULTS File Extension Spring Cleaning Results File Data Smith Micro Binary Data File saved by Spring Cleaning, a Smith Micro application used to optimize Mac OS X systems; stores the results of a system scan, which may include lists of application files, duplicate files, or other search data.
.SFB File Extension PlayStation 3 Disc Data File Game Sony Text Data File included as part of a Sony PlayStation 3 Game disc; saved in a Plain Text format and contains the Game identifier code; does not contain actual Game data files but describes the data on the disc; uses the filename PS3_DISC.SFB and can be seen on PlayStation 3 Backup hard drives.
.SP45 File Extension SuperCard Player File Data Solutions Etcetera Binary Data File used by SuperCard Player, an application used to execute SuperCard data Documents (.SC45 files); associated with the SuperCard Player application by default, but has the same format as a SC45 project file; used for storing presentations, user interfaces, standalone applications, and other programs.
.SZS File Extension Wii Game Data File Data N/A Binary Data File used by Games for the Nintendo Wii; most commonly known for storing 3D Model and texture data for the Wii Game Mario Kart, but also used by other Games for the same kinds of data as well as other types of data; sometimes modified by the homebrew and modding communities to create custom Mario Kart graphics.
.SUPP File Extension iOS Application Archive File Data Apple Binary Data File used by iOS applications; stored within an .IPA archive and contains data in an encrypted format; sometimes discovered by users of jailbroken iPhones.
.SRK File Extension Sub Rosa Client File Game Cryptic Sea Binary Game data file created by Sub Rosa, an online multiplayer first-person action Game; saves information about the client computer that has connected online to a Game; saved in the user directory of the Sub Rosa Game installation.
.SINF File Extension iOS Application Archive File Data Apple Unknown Data File used by iOS applications; contains DRM data about ITunes authorization, such as the username; often discovered by users of jailbroken iPhones or applications like iFunBox, a desktop file explorer for iPhone.
.TPZ File Extension Kindle Topaz eBook File eBook Amazon Binary eBook File used by Amazon Kindle devices and the Amazon Kindle desktop software; contains an eBook that has been saved from an Internet download to the computer; supports advanced embedded fonts as well as auxiliary information such as bookmarks and annotations, which are store in separate metadata files.
.TAB File Extension MapInfo TAB File GIS Pitney Bowes Software Text GIS file saved by MapInfo, a desktop mapping program now owned by Pitney Bowes Software; saved using ASCII text and can contain references to spatial data files used for visualization as well as spatial data itself.
.TDB File Extension eBay Turbo Lister Backup File Backup eBay Binary Backup file created by Turbo Lister, a program that helps users create professional eBay listings as well as edit and upload items in bulk; contains a Backup of all eBay listings for a particular user; saved in the "Data" directory of a Turbo Lister installation.
.TOC File Extension Eudora Table of Contents Misc QUALCOMM Unknown Contains a table of contents for messages stored within a certain Eudora mail folder; lists all the messages that are displayed when a mail folder is opened within Eudora.
.TOP File Extension Gromacs Topology File Data Gromacs Text Data File created by Gromacs, a molecular Analysis" title="Data Analysis">Data Analysis application; contains a molecular topology, which formally describes the structure of a molecule; created by pdb2gmx, a program that generates topologies from Protein Data Bank (.PDB) and Residue Topology Parameter (.RTP) files.
.TWBX File Extension Tableau Packaged Workbook Data Tableau Software Binary Data File created by Tableau Desktop, a whiteboard data visualization and Analysis program; contains the .TWB workbook plus all workbook data, including the external source data; used for packaging all data into a standalone file, which can be shared with others.
.TDE File Extension Tableau Data Extract File Data Tableau Software Binary Data File used by Tablaeu Desktop, a whiteboard visualization and Analysis application; contains data extracted from an external data source, such as a Microsoft Excel workbook, Microsoft Access Database, or a .CSV file; can also be extracted from a remotely connected data source.
.TED File Extension Alamo Map File Game Petroglyph Games Binary Map used by Games that use the Alamo gaming engine, which was developed by Petroglyph Games; contains a single or multiplayer level and includes terrain, weather, props, faction units, starting locations, and triggers; can be used to store and edit custom Game maps.
.TRM File Extension Oracle Trace Map File Database Oracle Unknown Metadata file format introduced with Oracle Database 11g, an enterprise-level relational Database management system (RDBMS); saves structural information about the records stored in a trace (.TRC) file; enables tools to process trace files more easily.
.TC File Extension TrueCrypt Volume Disk Image TrueCrypt Binary Virtual encrypted disk created by TrueCrypt, an open-source disk encryption program that creates real-time (on-the-fly) encrypted volumes.
.TTK File Extension Catalyst Translation Toolkit Data Alchemy Software Development Unknown Data File generated by CATALYST, a software localization program; stores Translated files in a highly optimized Database format capable of storing text or binary objects.
.TRC File Extension SQL Server Trace File Database Microsoft Unknown File created by SQL Server Profiler, which is included with SQL Server software; contains trace results of the activity of a SQL Database; can be used to analyze a sequence of Database statements.
.TWT File Extension Carmageddon 2 Data File Game N/A Unknown Game data file used by Carmageddon II: Carpocalypse Now, a 3D car racing/combat Game; stores mission data referenced by Carmageddon II; includes a hexadecimal header followed by Game data.
.TH File Extension Therion Data File GIS Therion Unknown Data File used by Therion, a cave system visualization application; contains "centreline" data, which represents the path of the logged locations in the cave; used for mapping underground cave systems and visualizing them in the software.
.TOL File Extension AOL Tool File Data America Online Unknown Data File referenced by America Online (AOL); similar to a .DLL file used by other applications; saved in the Program FilesAOL directory by default.
.TVL File Extension TurboTax File Misc N/A Unknown Data File installed with TurboTax; typically a hidden file.
.TDDD File Extension 3D Data Description File 3D Image Impulse Binary Three-dimensional image data file created by Imagine, a an older 3D Modeling and raytracing program; stores 3D objects and optionally obServer data; can be used for for rendering 3D Images from various obServer perspectives.
.USEQ File Extension USeq Genome Data File Data Huntsman Cancer Institute Zip Data File created in the USeq format, which is used in science and health research; contains genomic data and includes chromosome, strand, and slice observation data; compressed with Zip compression and used for distributing large genome datasets.
.UPR File Extension Fractal Parameters File Data N/A Text Data File used by fractal math and art programs such as Apophysis and Ultra Fractal; saved in a Plain Text format and contains the parameters used to generate a fractal image; often used for flame fractals; also used for sharing fractal sets with others.
.UPR File Extension Fractal Parameters File Data N/A Text Data File used by fractal math and art programs such as Apophysis and Ultra Fractal; saved in a Plain Text format and contains the parameters used to generate a fractal image; often used for flame fractals; also used for sharing fractal sets with others.
.UBOX File Extension Universe Sandbox Data File Data Universe Sandbox Zip Saved data file created by Universe Sandbox, an interactive astronomy application; saves a simulation through space and can include planets, stars, moons, man-made objects, orbital motions, and other simulated data; used for sharing and playing back universe explorations.
.UXX File Extension Unreal Tournament Cache Game N/A Unknown Cache of a data file recently used by Unreal Tournament
.ULF File Extension Universal List File Data N/A Unknown Data File formatted in Universal List Format (ULF); contains a list of elements similar to an .XML Document; often used by Geographic Information Systems (GIS) applications to store coordinates and vertexes.
.ULD File Extension Unified Luminaire Data File CAD DIAL Unknown Data File used by DIALux, a professional light planning software for indoor and outdoor lighting; contains data about the lighting specifications of a luminaire, such as the fixture description, fixture image, luminous flux, power consumption, and a 3D Model for viewing; cannot be created by the user, only used for viewing.
.UDS File Extension Sierra Generations File Data Sierra Unknown File created by Sierra Generations, a program that stores family tree data; contains names, dates, ancestors, and descendants.
.URT File Extension Utah Raster Toolkit File Raster Image N/A Binary Image data file created by the Utah Raster Toolkit, a Unix-based graphics package; stores images using a Run-length encoding (RLE) compression algorithm; used for storing images in an independent format so they can be manipulated and then exported to other image formats.
.VOB File Extension DVD Video Object File Video N/A Binary Movie data file from a DVD disc, typically stored in the VIDEO_TS folder; contains the majority of data stored on the disc including video, audio, and Subtitles" title="Subtitles">Subtitles; usually formatted as an MPEG-2 system stream and can be opened by various video Playback programs.
.VPK File Extension Valve Pak Game Valve Binary Game File used by some Games developed with the Source Engine, which include Half-Life, Left 4 Dead, DOTA 2, and Portal 2; may be a master directory file for a collection of VPK files or may be one of the raw VPK data files; used for storing maps, models, materials, choreography scenes, and other original Game content, but can can be used for making Game mods as well.
.VDF File Extension AntiVir Virus Definitions File Data Avira Operations Binary Data File used by AntiVir, an antivirus application for Windows; saves virus definitions, which contain signatures that are used for recognizing viruses on the computer system; often downloaded during software updates so the software can check for new viruses.
.VDF File Extension AntiVir Virus Definitions File Data Avira Operations Binary Data File used by AntiVir, an antivirus application for Windows; saves virus definitions, which contain signatures that are used for recognizing viruses on the computer system; often downloaded during software updates so the software can check for new viruses.
.VPX File Extension Avast! Virus Update File Data AVAST Software Binary Data File used by avast!, an antivirus and Internet security application; may contain virus definitions and software update information; used for keeping the software up-to-date with the latest protection signatures.
.VBPF1 File Extension Virtual Business - Personal Finance Data File Data Knowledge Matters Unknown Data File saved by Virtual Business - Personal Finance, a financial education program that helps students learn and practice key financial skills; contains saved simulation data such as Game bank accounts, bills, credit and debit cards, taxes, insurance, credit scores, and investing information.
.VTT File Extension Web Video Text Tracks File Video N/A Text Text data file saved in the Web Video Text Tracks (WebVTT) format; contains information about a web video, such as Subtitles" title="Subtitles">Subtitles, captions, descriptions, chapters, and metadata; does not contain any video data.
.VCX File Extension Virtual Disc Definition File Disk Image H+H Software Binary File created by Virtual CD Editor, a disc editing program included with the Virtual CD software; saves the list of files that will be burned to the disc; used for creating the disc image, which is comprised of a .VC4 file and .000, ".001," ".002," etc. data files.
.VDC File Extension IDRISI Vector Documentation File GIS Clark Labs Unknown GIS image metadata file created by IDRISI Taiga, a GIS imaging application; describes the data stored in a .VCT vector image file; can include coordinate information as well as a reference to geographic projection data that is used to draw the image according to measurement units.
.VIV File Extension Need for Speed Car Data File Game Electronic Arts Binary Data File used by Need for Speed 1-3 car racing Games; contains vehicle data such as 3D Models and sounds; used by the Game to load racing cars; sometimes edited by Game modders.
.VAULT File Extension Fontcase Vault File Data Bohemian Coding Binary Data File created by Fontcase, a font manager for Mac OS X; saves the list of imported user, shared, or system level fonts; also saves the activation or deactivation status of each font as well as other metadata such as ratings.
.VVF File Extension Voc Vocabulary File Data Christian Zigotzky Binary Data File used by Voc, a command-line program used to create vocabularies and administer multi-lingual vocabulary quizzes; contains Plain Text vocabulary words in a comma separated format, which is the format of .CSV files; stores words and their translation in another Language; used for loading vocabulary questions to the user in Voc.
.VDJSEND File Extension VirtualDJ Send File Misc Atomix Productions Text Data File used by VirtualDJ, an audio and video mixing software featuring the BeatLock engine, which provides automatic loop and beat synchronization; saved in a Plain Text format and contains audio information; saved to the [user]My DocumentsVirtualDJ directory in Windows.
.WZ File Extension MapleStory Game Data File Game NEXON Binary Game archive used by MapleStore, a two-dimensional MMORPG (massively multiplayer online role-playing Game); can store several types of Game data, including audio, maps, and character information; used for both the original MapleStory installation files and for Game patch updates.
.WAD File Extension Doom WAD File Game id Software Binary Game data file used by Doom and Doom II, as well as other first-person shooter Games that use the original Doom engine; contains data such as sprites (graphics), level information, and items; used for storing original Game content as well as Game modifications.
.WAD File Extension Doom WAD File Game id Software Binary Game data file used by Doom and Doom II, as well as other first-person shooter Games that use the original Doom engine; contains data such as sprites (graphics), level information, and items; used for storing original Game content as well as Game modifications.
.WPT File Extension WordPerfect Template Text Corel Binary Template created by WordPerfect, a word processing application that is part of the WordPerfect Office suite; stores a pre-formatted Document that can be used to create WordPerfect (.WPD) Documents; enables users to create multiple Documents with a similar look and feel.
.WEA File Extension Ecotect Weather File Data Autodesk Unknown Weather data file used by Autodesk Ecotect, a building Analysis program for designing energy efficient buildings; may also be opened using the Weather Tool, a program used for analyzing and visualizing hourly climate data.
.WALLETX File Extension Enpass Data File Backup Sinew Software Systems Unknown Data File created by Enpass, an application used to manage passwords and other confidential information; stores an encrypted Backup of your information that can only be opened by Enpass software.
.WID File Extension SAP BusinessObjects Web Intelligence File Data SAP Binary Data File created by SAP BusinessObjects, a business analytics application used for studying competitive intelligence, profits, and customer relationships; saves a collection of data and reports that are the result of Analysis conducted in the software; used for storing business intelligence analyses.
.WJR File Extension ReGet Deluxe Data File Data ReGet Unknown Data File used by ReGet Deluxe, a modern download manager for Windows XP and Vista; may store configuration information (Default.wjr), file queue data (Queue.wjr), or other information referenced by ReGet.
.WHF File Extension Wing Helper File Data Wing Helper e.U. Binary Proprietary data file generated by Wing Helper, a parametric 3D CAD tool for designing RC airplanes; contains information about all RC airplane elements that Wing Helper supports.
.WLB File Extension WinList Protocol Bundle Compressed Verity Software House Zip Protocol bundle file used by WinList, a flow cytometry Analysis program; contains a .WLX file in a Zip-compatible format; includes copies of FCS data files that are used in the setup.
.WL6 File Extension Wolfenstein 3D Data File Game id Software Unknown Game data file used by Wolfenstein 3D, one of the original first-person shooters (FPS); may contain sprites, textures, sounds, maps, and other data; loaded during Gameplay.
.WTR File Extension Encarta File Data Microsoft Unknown Data File used by the Encarta encyclopedia program; contains resources referenced by encyclopedia entries; accessed by the Encarta software and should not be opened manually.
.WL1 File Extension Wolfenstein 3D Data File Game id Software Binary Game data file used by Wolfenstein 3D, the original installation of the Wolfenstein first-person shooter series; may contain sprites, textures, sounds, maps, and other data; used by the shareware version of Wolfenstein 3D.
.XML File Extension XML File Data N/A XML XML (Extensible Markup Language) data file that uses tags to define objects and object attributes; formatted much like an .HTML Document, but uses custom tags to define objects and the data within each object; can be thought of as a text-based Database.
.XTM File Extension CmapTools Exported Topic Map Data IHMC Unknown Concept map created by CmapTools, a program used for visualizing organized knowledge; consists of graphical and textual data that can be displayed within CmapTools; does not include layout, style, or background image information.
.XTP File Extension xTime Project Document Data adnx Unknown Project accessed by xPlan, a project management application; similar to the .PJ2 and .PJM file; created by the app4mac xTime Project program, which became xPlan; contains project data input such as the budget, project tasks, days off, and task duration.
.XFLOW File Extension FlowExchange Data File Data AmsterCHEM XML Data File created in the FlowExchange format, which is used to transfer material stream data between CAPE-OPEN compliant flowsheet simulators; stores flowsheet material stream data and physical properties.
.XNB File Extension XNA Game Studio Binary Package Game Microsoft Binary Binary data file created with XNA Game Studio Express, an IDE designed for developing Windows and Xbox 360 Games; contains one or more files in a single package.
.XMLPER File Extension LeCroy Binary Waveform File Data N/A Unknown Contains datapoints used to recreate a waveform saved on a LeCroy Oscilloscope as a binary data file; typically written "XMLper"
.XMB File Extension X-Wing Mission Briefing File Game LucasArts Unknown Data File used by X-Wing, a 3D spaceship simulation Game released in the mid-1990s by LucasArts; contains information displayed during the briefing of a specific mission.
.XEN File Extension Guitar Hero III Data File Game Activision Unknown Data File used by Guitar Hero III for the Mac or PC; may contain graphics, textures, video, audio or other data used by the Game; stored in a package format and usually named "[filename].pak.xen."
.XYZ File Extension Molecule Specification File Data N/A Text File used by various chemistry programs, such as TINKER and UniChem; contains a description of a molecule, including the number of atoms, element symbol, and X, Y, and Z coordinates; stored in a Plain Text format.
.XYZV File Extension Celestia Sampled Trajectory File Data Celestia Development Team Text Data File used by Celestia, a free universe visualization program; saves a list of positions and timestamps as well as velocities for each position; used for defining the location and trajectory of entities, such as planets, moons, and stars.
.XTL File Extension Vietcong Data File Game Pterodon Binary Data File used by Vietcong, an FPS (first-person shooter) Game that takes place during the Vietnam War; typically stored within another Game data file, which can be extracted using some file unpacking utilities.
.XCPLUGINDATA File Extension Xcode Plug-in Data File Data Apple Unknown Plugin data file used by Apple Xcode, a Mac OS X software development program; contains data referenced by Xcode plugin files to provide functionality, such as generating .PLIST file structure definitions for an application; located inside .DVTPLUGIN and IDEPLUGIN files.
.YPS File Extension Yahoo! Messenger Data File Misc Yahoo! Unknown Data File created by Yahoo! Messenger, an instant messaging application developed by Yahoo!; used by older versions of Yahoo! Messenger.
.YMG File Extension Yahoo! Messenger File Misc Yahoo! Unknown Data File used by Yahoo! Messenger, an online chatting application developed by Yahoo!; contains information used to run the application; used by older versions of Yahoo! Messenger.
.ZAP File Extension ZoneAlarm Pro Data File Data Check Point Software Technologies Unknown Data File used by Zone Alarm utilities; contains security information and settings referenced by the program; common ZAP files include alert.zap, email.zap, filter.zap, firewall.zap, programs.zap, and security.zap.
.ZTD File Extension Zoo Tycoon Data Archive Game Microsoft Unknown Game data file used by Zoo Tycoon, a zoo simulation Game; serves as an add-on that adds extra features to the Game; includes scenery, items, animals, and artificial intelligence data.
.ZZZ File Extension CCleaner Securely Deleted File Misc Piriform Unknown File created by CCleaner, a utility used for optimizing computers by removing unused programs and files; stores a deleted file that has been securely wiped, which enables greater security since the original filename no longer exists; uses the filename ZZZZZZZZ.ZZZ.
.Z80 File Extension TI-83 and 84 Plus Calculator File Misc Texas Instruments Unknown Data File used by the Texas Instruments TI-83 and TI-84 Plus series calculators; may be used for a variety of purposes, including storing information that describes characters, such as Falco, Fox, and Jigglypuff, used in the Super Smash Bros. Open Game.
.ZDB File Extension Zimbra Database File Data Zimbra Binary Email data file created by Zimbra Connector for Microsoft Outlook (ZCO), a plug-in for Outlook used to manage Zimbra email accounts; saved in the Outlook .PST format but uses the ".zdb" extension instead; can be imported into an Outlook profile by first renaming the file extension to ".pst."
.ZAD File Extension Carmageddon Game Data File Game Stainless Games Zip Compressed Game data file used by Carmaggedon: Reincarnation, a car racing Game; contains compressed Game data that alters Gameplay, such as opponents, races, and power ups; similar to a .ZIP file but uses the ZAD extension.
.ZMA File Extension Impedance File Data N/A Text Data File created by the SPL Tracer, a speaker frequency response and impedance graph tracer application; contains speaker data, such as impedance level units and phase information necessary for drivers; similar to .FRD files.
.ZSD File Extension Dave Mirra Freestyle BMX Data File Game Acclaim Entertainment Unknown Game data file used by the Playstation Games "Dave Mirra Freestyle BMX" and "Dave Mirra Freestyle BMX 2;" contains audio and video data that is referenced during Gameplay; may be opened on a PC using a third-party utility such as Game Extractor or MFAudio.
.BIN File Extension Generic Binary File Data N/A Unknown File that stores data in a binary format; different than a text-based file, which can be edited in a text editor; may be created by a variety of different programs; typically cannot be manually edited.
.BOOK File Extension iBooks Author Document Data Apple Binary Book design project created by iBooks Author, a program used for authoring digital books for the Apple iPad; stores the sections and chapters of an iBook; can be exported to the .IBOOKS format and directly uploaded to an iPad, or may be published to the Apple iBookstore using the .ITMSP format.
.BUP File Extension McAfee Quarantined File Misc McAfee Zip Quarantined file created by McAfee anti-virus products; saves a Backup of a file that was moved from another location on the computer because a virus or other malware was detected; saved to the following directory in Windows Vista and Windows 7:
.BGL File Extension Babylon Glossary File Data Babylon Binary Glossary file used by Babylon, a program that supports online translation in many different Languages; contains terms and definitions that can be loaded into Babylon; can be Translated on-the-fly into different Languages by the Babylon application.
.BAR File Extension Age of Empires 3 Data File Game Microsoft Binary Data File used by Age of Empires III, a strategy Game where players control units and build empires; may include Game data, such as textures, music, fonts, text, and other Game settings; serves as a file container that holds Game data.
.BNK File Extension Adlib Instrument Bank Audio Adlib Unknown Instrument banks accessed by Adlib Visual Composer, a music composition program; designed to be loaded with .ROL files; contains custom instrument data to accompany the ROL files that contain the Notes to play the instruments that make up the scores.
.BFS File Extension FlatOut Game Data File Game Bugbear Entertainment Binary Data File used by the FlatOut stunt racing video Games; contains various types of Game data, such as car models and racing tracks; often used for altering, or "modding," Game content; can be unpacked using tools such as BFS2Unpacker and bfsunpack.
.BMD File Extension MU Online Game Data File Game WEBZEN Binary Game data file used by MU Online, a medieval MMORPG (Massively Multiplayer Online Role-Playing Game); may contain 3D Models, textures, Animations, maps, in-Game text, or other Game data.
.BRN File Extension BrainStorm Data File Data BrainStorm Software Unknown File created by BrainStorm, a program used for capturing ideas in a structured manner; contains a title for an idea and subpoints, which together comprise a tree of information; may store references to files, pictures, hyperlinks, and other information; can be viewed from different perspectives in the software.
.BNP File Extension Sony Camcorder Video Data File Video Sony Unknown Data File created by some Sony digital camcorders; stored within the AVF_INFO directory on the camcorder and contains metadata about the recorded videos; used for displaying information on the camcorder such as the dates and number of videos recorded.
.BAFL File Extension BurnAware File List Data Burnaware Technologies XML Text File created with BurnAware disc burning software; contains a list of data files that can be burned to a CD, DVD, or Blu-ray disc; saved in an XML Format">XML Format with one file per line.
.BDAE File Extension Gameloft Game Data File Game Gameloft Binary Data File used by Gameloft mobile Games such as Modern Combat 2: Black Pegasus and Gangstar: West Coast Hustle; contains Game data such as weapon and visual effects information.
.BKUP File Extension Backup File Backup N/A Unknown Generic Backup file used by various programs and scripts for creating Backups; may be a Backup of critical data files or of other files such as logs; used for restoring the original files in case an unexpected event occurs.
.3DD File Extension ArcGlobe Document GIS Files ESRI Binary GIS data file created by ArcGlobe, a visualization application used to view 3D GIS datasets; stores a reference to a geodatabase, which contains the spatial content and output results created by the softwares geoprocessing operations; can store GIS data as a collection of three-dimensional layers; used for saving and loading views of 3D GIS datasets.
.4DV File Extension 4D View Ultrasound File Data Files General Electric Unknown Ultrasound data file generated by a GE Healthcare Voluson ultrasound machine; can be viewed using GEs 4D View software or ViewPoint with the 4D View plug-in.
.8XP File Extension TI-83 Plus Calculator File Misc Files Texas Instruments Unknown Program or data file used by the Texas Instruments TI-83 Plus and TI-84 series calculators; can be transferred to the calculator from a computer using a TI Connectivity Cable and the included software.
.83P File Extension TI-83 Calculator File Misc Files Texas Instruments Unknown Calculator program or data file used by the Texas Instruments TI-83 calculator; can be transferred calculator from a computer to the calculator using a TI Connectivity Cable and the included software; the original TI-GRAPH LINK software has been replaced by TI Connect.
.CZI File Extension Carl Zeiss Image Data File Data Carl Zeiss Binary Microscope image data file created in the Carl Zeiss CZI format; can save image stacks, time lapse series, and tile images captured from a Carl Zeiss microscope; used for generating video sequences and performing medical research.
.CL5 File Extension Easy CD Creator 5 Saved Project Disk Image Roxio Unknown CD authoring project created with Easy CD Creator 5; contains references to files that will be included on the CD as well as other settings; may include data files or a playlist of audio files for creating an audio CD.
.CTY File Extension SimCity City File Game Maxis Unknown City data file used by early versions of SimCity; contains city layouts and objects (buildings, roads, trees, etc.) as well as settings, such as the starting amount of money for the city; used as a starting point for building a city.
.DESKTOP File Extension Desktop Entry File Misc N/A Unknown Data file that provides information about an item in a programs menu; specifies details such as the name, icon file, command to run, etc; used in Unix-based operating systems such as CentOS, Ubuntu, and Red Hat Enterprise Linux.
.DA5 File Extension AGT Game Data File Game N/A Unknown Game data file referenced by AGiliTy, a program that interprets Adventure Game Toolkit (AGT) games; contains meta-language commands for the game, which are conditional tests that help the game determine if an action made by the player is possible; will not exist if there are no meta-language commands in the game.
.ELD File Extension Eulumdat Formatted Luminaire Data File CAD DIAL Text Luminaire data file used by DIALux, a professional light planning application for various lighting environments; contains lighting data for a light fixture, which include the light intensity, the light distribution curve, and the size of the luminaire; can be used interchangeably with a .LDT file.
.ERSX File Extension Eraser Task List File Data Eraser Binary Data file created by Eraser, a Windows program used for securely erasing files and folders from your hard drive; saves a list of erasing tasks as well as the schedule information for when to run each task.
.ESQ File Extension Embroidery Sequence File Data VSM Group Unknown Data file created by Pfaff embroidery machines; saves references to multiple .EMB embroidery files, but does not contain the embroidery designs themselves; stores information such as the hoop placement for the designs; allows designs to be sequenced one after another.
.FFS File Extension FME Desktop Feature Store File GIS Safe Software Binary Data file created by FME Desktop, an application used for manipulating and converting spatial data; contains "features," which are spatial data sets and objects stored in FME Desktops format-neutral representation.
.FLAME File Extension Fractal Flames File Data N/A XML Data file that saves parameters used for making fractal graphics and animations called "flames;" can include one or more fractal patterns, each of which can be customized by adjusting variables and gradients used by the fractal; saved in an XML format and must be rendered by a software program to output a corresponding image or animation.
.FML File Extension WWE RAW Character File Game THQ Unknown Data file that stores information about character in the WWE RAW wrestling video game; can be modified with a Hex editor to alter the characters attributes; used in combination with an .XPK file to determine each characters features.
.HGT File Extension SRTM Elevation Data File GIS N/A Binary GIS data file stored in the Shuttle Radar Topography Mission (SRTM) format; contains global elevation data captured during NASA space missions; may include up to a one arcsecond resolution; used for analyzing the earths topography and for generating topographical images.
.HDZ File Extension Compressed Poser Hand Pose File 3D Image Smith Micro Unknown Compressed hand pose data file used by Poser, a 3D character modeling and animation program; includes pose data specific to a characters hands, such as hand motions and finger positions.
.H0 File Extension Movie Edit Pro Waveform Information File Audio MAGIX Binary Audio data file created by Movie Edit Pro (MEP), an application used to create movies; contains a visual representation of a movie project sound file; used by the MEP interface to display the audio waveform.
.IPMETA File Extension Apple iPhoto Metadata File Data Apple Binary Metadata file used by Apple iPhoto, a program used to manage digital photos; stores information about the users library of images; stores the schema for the metadata as well as search, browsing, organization, and previewing information used by iPhoto.
.JRZ File Extension PSP Game Data File Game Sony Binary Data file used by games for the PlayStation Portable (PSP), such as XSEED Games Half-Minute Hero game; contains references to .VAG audio files; may also contain other game data; used for storing in-game content.
.LDT File Extension Eulumdat Formatted Luminaire Data File CAD DIAL Text Light fixture, or luminaire, data file used by DIALux, a professional light planning software for indoor and outdoor lighting; stores lighting parameters for a luminaire, which include the number of lamps, the light intensity, the light distribution curve, and the size of the luminaire.
.LPDB File Extension Librarian Pro Database File Data Koingo Software Binary Data file created by Librarian Pro, a program used for organizing personal libraries of books, software, music, and movies; contains descriptive information about each item, such as the title, genre, author or artist, and a personal rating; used for storing and updating a users personal database.
.LTL File Extension Luminaire Data File CAD N/A Unknown Data file used by DIALux, a program that enables you to model and plan lighting for indoor and outdoor environments; contains data about a light fixtures power consumption, luminous flux, light intensity, light radius, and more; referenced by DIALux to model the light fixtures capabilities.
.LHR File Extension Quicken Financial Life for Mac File Data Intuit Binary Data file created by Quicken Financial Life for Mac, a personal money management program that never reached a version beyond beta; stored financial data for the user but was not compatible with the Quicken Windows software or other versions of the Quicken software.
.NBM File Extension NetBeans Module Plugin Oracle Zip Plug-in file used by NetBeans, a cross-platform Integrated Development Environment (IDE); stores a compressed .ZIP archive of XML, .JAR, and metadata files; also supports pack200 compression (.PACK.GZ extension) for included JAR files; often distributed via download on the Web.
.NDIF File Extension Nokia Data File Data Nokia Binary Data file created on a Nokia phones memory card; may contain backup data or other data used to update information on the phone; sometimes seen as an empty zero kilobyte (0KB) file; may be downloaded from the phone using Nokia PC Suite.
.NVRAM File Extension VMware NVRAM File Data VMware Binary Virtual machine (VM) data file used by VMware virtualization software; stores the state of the VMs BIOS; saved as part of the overall set of files that comprise the VM; should not be manually opened or edited, since the data is handled by the software.
.PBXPROJ File Extension Xcode Project Data File Developer Apple Text Data file created by Xcode, a development application for Mac OS X; saves project data such as the list of source code and resource files and the build properties; also saves the Group data, which organizes the resource files in a virtual folder hierarchy.
.PBO File Extension Packed Bohemia Object Game Bohemia Interactive Unknown Data file used by several Bohemia Interactive games; may contain mission data, campaigns, or add-ons; saved as a package that includes multiple files.
.PI File Extension Pi Calculation Data File Data 10101 Unknown Data file used by iPi, a pi calculation program; saves the progress of a users pi calculation; Pi is the ratio of the circumference to the diameter of a circle, and is approximately 3.1415926536.
.QMBL File Extension LabQuest Document Data Vernier Unknown Data file created and used by LabQuest, an interface used to collect sensor data; stores experiment results recorded from a LabQuest device; may contain data-collection settings, data tables, analyses, graphs, and notes.
.QUICKENBACKUP File Extension Quicken Essentials for Mac Backup File Backup Intuit Binary Backup file created by Quicken Essentials for Mac, the Mac version of the Quicken personal and business financial management software; stores a backup of the users data, which is stored in a .QUICKENDATA file; should be created periodically by Quicken Essentials for Mac users and sent to a secure location.
.QDT File Extension Quicken 3 & 4 Data File Data Intuit Binary Financial data file used by Quicken versions 3 & 4 for DOS; used as the primary file for storing the users financial data, but has been replaced by newer formats in later versions of the software.
.RPROJ File Extension R Project Settings The R Project for Statistical Computing Unknown Project created and used by RStudio, an open source IDE for the R programming language; contains project information used to customize the behavior of RStudio, such as loading RStudio settings and restoring previously edited source documents into editor tabs; also used to indicate whether to load the .RHISTORY file for use in the RStudio History pane and the .RDATA file in the projects main directory.
.RVDATA2 File Extension RPG Maker VX Ace Data File Game Enterbrain Binary Game data file created by RPG Maker VX Ace (RPGVX), an application that enables you to create role-playing games; stores various types of game data, such as items, characters, armors, enemies, skills, maps, ; used for saving development progress while creating your role-playing game; similar to .RVDATA files, which are used by Enterbrains RPG Maker VX.
.RVPROJ2 File Extension RPG Maker VX Ace Project File Game Enterbrain Unknown Game project created with RPG Maker VX Ace, a role-playing game (RPG) development program; similar to the .RVPROJ file, which is the project file associated with Enterbrain RPG Maker VX; contains links to resources, such as audio, graphics, and data files, referenced by the game; includes .RVDATA2 files.
.RGN File Extension Garmin Regional Map File GIS Garmin Unknown Map data file saved in a database format; contains a map of a specific region that can be loaded by Garmin software and GPS devices; may also contain information that can be used to update a GPS devices firmware.
.SC2ASSETS File Extension Blizzard StarCraft 2 Assets File Game Blizzard Entertainment Binary MoPaQ data file (.MPQ file) used by StarCraft II: Wings of Liberty, an outer space real-time strategy game; stores an archive of data files for a game campaign or modification; may be installed with the game, or may be created using a MPQ editor.
.SII File Extension 18 Wheels of Steel: Haulin Truck Definition File Game SCS Software Text Data file used by 18 Wheels of Steel: Haulin, a truck driving game; contains properties for a truck, such as the engine class; saved in a plain text format and often altered for creating custom truck configurations.
.SC2DATA File Extension Blizzard StarCraft 2 Data File Game Blizzard Entertainment Binary Data file used by StarCraft II: Wings of Liberty, a real-time strategy game that takes place in outer space; stored in the Blizzard MoPaQ format (.MPQ files); can contain various types of files, such as XML configurations, fonts, animations, hotkey mappings, UI layouts, and artificial intelligence (AI) instructions.
.SC2ARCHIVE File Extension Blizzard StarCraft 2 Archive File Game Blizzard Entertainment Binary Data file used by StarCraft II, a sci-fi real-time strategy game; stores an archive of files in Blizzards MoPaQ format (.MPQ files); may store models, textures, sounds, settings, and other game data; typically used for applying patches, such as bug fixes, to the game.
.SE1 File Extension Swiss Ephemeris Data File Data Astrodienst Unknown Data file created and used by Swiss Ephemeris, a high precision ephemeris used to compute complete horoscopes; contains data about planets, moons, or planetoids; used to increase the precision of the built-in default ephemeris.
.SKD File Extension Max Payne Skin Data File Game Rockstar Games Unknown Game data file used by Max Payne, a third-person shooter noir video game; contains data that points to the location of the texture used for a models skin.
.SIDD File Extension iTunes Authorization Data File Misc Apple Binary Data file used by iTunes, a music and video playback application; contains data that authorizes the computer and user to play purchased songs and videos with the user account; similar to .SIDB and .SIDN files; not meant to be opened manually by the user.
.SCLVL File Extension Scritter s Nest Data File Game Krishiv Unknown Data file created for Scritters Nest, a PC game; contains data used in the help section of the game; holds data, such as images, referenced during gameplay; not meant to be manually opened; similar to a .DAT file.
.TT10 File Extension TurboTax Canada 2010 Tax Return Data Intuit Canada Binary Tax return created by Intuit Canada TurboTax, a program used for preparing and filing Canadian tax returns; contains a tax return created for the 2010 tax year; includes the T1-2010 and all other necessary forms, as well as data filed out by the user.
.TFA File Extension TreeSoft CashFlow Analysis Data File Data treeSoft Unknown Data file saved by treeSoft CashFlow Analysis, a property cash flow projection and valuations program; offers complete financial analysis with detailed input options; can also create quality reports that can be used for presentations.
.TMW File Extension Translation Memory Data File Data SDL Unknown Data file that contains linguistic and translation units for a translation memory used by Trados document translation software; continually grows and learns from the translator; can be opened directly with Trados Translators Workbench.
.VUD File Extension Virtual Machine Undo Drive File Data Microsoft Binary Data file used by Windows Virtual PC, an emulation program used to run Windows virtual machines (VMs); stores the changes made to the virtual machines virtual disk (.VHD file) since the VHD file was last loaded; tracks the files that were created, deleted, and modified.
.VSV File Extension Virtual Machine Saved State File Data Microsoft Binary Data file created by Windows Virtual PC and Virtual Server emulation applications; saves the state of the virtual machines memory, which includes the running applications and opened data; enables users to save VM snapshots and revert back to the exact state as they were saved.
.XCAPPDATA File Extension Xcode App Data File Developer Apple Binary Data file exported from Xcode, Apples development IDE for Mac OS X and iOS; saves a package of user files that are saved by app on the iPhone; used by developers when testing apps.
.YAM File Extension Yahoo! Auctions Data Data Yahoo! Unknown Data file created by Yahoo! Sellers Manager, a desktop auction management program for Yahoo! Auctions, an early competitor to eBay; saves auction data such as the sellers information, items for sale, and item categories.
.BXL File Extension Accelerated Designs PCB Library File CAD Accelerated Designs Binary Electronics data file created in Accelerated Designs BXL format (referred to as the Xlator DataBase format); can specify both PCB footprints and schematic symbols; used for distributing PCB information in a vendor neutral format.
.BLOB File Extension Valve Steam Archive Settings Valve Binary Data file referenced by Valve Corporations Steam, an online software distribution program; stores user registry information for the Steam client in the file ClientRegistry.blob, as well as application update information in the file AppUpdateStats.blob.


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