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| Extension | File Type Developer | File Category | File Type Description | Primary Software | Primary Software Developer |
|---|---|---|---|---|---|
| .)2( | Haruyasu Yoshizaki | Temporary Files | LHA Archiver Temporary Data | LHA | Haruyasu Yoshizaki |
| .--- | Microsoft Corporation | Temporary Files | Windows Temporary File | MS-DOS | Microsoft Corporation |
| .AAA | SAP | Temporary Files | Sybase SQL Anywhere Temporary Data | SQL Anywhere | SAP |
| .ADBLOCK | Alpha Software | Temporary Files | Alpha Five Library Temporary File | Alpha Anywhere - Alpha Software | Alpha Software |
| .BDE | Borland | Temporary Files | Borland Database Engine | Borland C++ | Micro Focus International plc |
| .BDI | PTC | Temporary Files | Pro/ENGINEER Temporary Data File | Pro/ENGINEER | PTC |
| .BMB | PTC | Temporary Files | Pro/ENGINEER Temporary Data File | Pro/ENGINEER | PTC |
| .BUF | Unknown Developer | Temporary Files | Buffer File | Unknown Software | Unknown Developer |
| .BV2 | Corel Corporation | Temporary Files | Corel WordPerfect Overflow File | Corel WordPerfect X8 | Corel |
| .BV3 | Corel Corporation | Temporary Files | Corel WordPerfect Overflow File | Corel WordPerfect X8 | Corel |
| .BV4 | Corel Corporation | Temporary Files | Corel WordPerfect Overflow File | Corel WordPerfect X8 | Corel |
| .BV6 | Corel Corporation | Temporary Files | Corel WordPerfect Overflow File | Corel WordPerfect X8 | Corel |
| .BV7 | Corel Corporation | Temporary Files | Corel WordPerfect Overflow File | Corel WordPerfect X8 | Corel |
| .C1S | Phase One | Temporary Files | Capture One Photo Cache File | Capture One | Phase One |
| .CFA | Frontline | Temporary Files | ComProbe Analyzer Capture File | Frontline ComProbe Analysis System | Frontline |
| .CKI | Open Source | Temporary Files | Off By One Browser Persistent HTTP Cookies | Off by One Browser | Open Source |
| .CLEAN | Temporary Files | Instagram For Android Cache | |||
| .CSI | ContentServ | Temporary Files | ContentServ Include File | ContentServ CS EMMS Suite | ContentServ |
| .DIA | Spacetornado Software | Temporary Files | Do It Again Task File | Do It Again | Spacetornado Software |
| .DLM | AKAMAI | Temporary Files | Akamai Download Manager File | Akamai Download Manager | AKAMAI |
| .DOW | Howard Benner | Temporary Files | TAPCIS Download Command List | TAPCIS | Howard Benner |
| .DW3 | SourceForge | Temporary Files | DeathWatch WebCrawler Data | Deathwatch WebCrawler | SourceForge |
| .FB! | Hou Yantang | Temporary Files | FlashGet Incomplete Download | FlashGet | Hou Yantang |
| .FILEPART | Martin Prikryl | Temporary Files | WinSCP Temporary Transfer Data | WinSCP | Martin Prikryl |
| .FORCE | Microsoft Corporation | Temporary Files | Microsoft 2005 And 2008 Visual Studio File | Microsoft Visual Studio | Microsoft Corporation |
| .FSF | Microsoft Corporation | Temporary Files | Microsoft Office Cache Data | Microsoft Office | Microsoft Corporation |
| .IFF | Electronic Arts | Temporary Files | Interchange File Format | IrfanView | Open Source |
| .ILP | Gurobi Optimization | Temporary Files | Gurobi Optimizer Temporary Data | Gurobi Optimizer | Gurobi Optimization |
| .IMS | CursorArts Company | Temporary Files | IconForge Create Executable Library Data | IconForge | CursorArts Company |
| .INF | Parametric Technology Corporation | Temporary Files | Pro/ENGINEER Temporary | Pro/ENGINEER | PTC |
| .INIT | WebMoney Transfer | Temporary Files | WM Keeper CLASSIC Temporary Key | Keeper WinPro | WebMoney Transfer |
| .IPL | Rockstar Games | Temporary Files | GTA Item Placement File | Grand Theft Auto III | Rockstar Games |
| .IRD | Microsoft Corporation | Temporary Files | Microsoft Money Temporary File | Microsoft Money | Microsoft Corporation |
| .JOURNAL | Nuance | Temporary Files | Equitrac Cache | Equitrac | Nuance |
| .LRD | Microsoft Corporation | Temporary Files | Microsoft Money Lock Data | Microsoft Money | Microsoft Corporation |
| .MEB | Interscape | Temporary Files | PRO100 3D Interior Catalog Element | Ecru Software PRO100 | Ecru Software |
| .MEX | MathWorks | Temporary Files | MATLAB Dynamically Linked Subroutine File | The MathWorks MATLAB | MathWorks |
| .MRC | mIRC Co. Ltd | Temporary Files | mIRC Script File | mIRC | mIRC Co. Ltd |
| .ONEBIN | Microsoft Corporation | Temporary Files | OneNote Data | Microsoft OneNote | Microsoft Corporation |
| .ONECACHE | Microsoft Corporation | Temporary Files | Microsoft OneNote Cache File | Microsoft OneNote | Microsoft Corporation |
| .PHC | David Harris | Temporary Files | Pegasus Mail Header Cache | Pegasus Mail | David Harris |
| .PKC | Python Software Foundation | Temporary Files | Jython JAR Cache | Jython | Python Software Foundation |
| .PM$ | David Harris | Temporary Files | Pegasus Mail Temporary Data | Pegasus Mail | David Harris |
| .QBI | Intuit, Inc. | Temporary Files | QuickBooks Crash Roll Back File | QuickBooks | Intuit, Inc. |
| .QBT | Intuit, Inc. | Temporary Files | QuickBooks Temporary Rebuild File | QuickBooks | Intuit, Inc. |
| .RCV | Oracle Corporation | Temporary Files | Oracle Recovery Manager Script | Oracle Database | Oracle Corporation |
| .RLD | Symantec Corporation | Temporary Files | Norton Commander Temporary | Norton Commander | Symantec Corporation |
| .SFM | Samsung Electronics | Temporary Files | S Memo Data Cache | S Memo | Samsung Electronics |
| .TEC | SIL International | Temporary Files | TECkit Compiled Mapping File | TECkit | SIL International |
| .TMP | Mozilla | Temporary Files | General Temporary File | Internet Explorer | Microsoft Corporation |
| .TOF | NewSoft Technology Corporation | Temporary Files | Mr. Photo Temporary Thumbnail | Presto! Mr. Photo | NewSoft Technology Corporation |
| .TORCHDOWNLOAD | Torch Media Inc. | Temporary Files | Torch Web Browser Partial Download | Torch | Torch Media Inc. |
| .TT2 | Microsoft Corporation | Temporary Files | Microsoft Office 2013 Installation | Microsoft Office | Microsoft Corporation |
| .TV5 | Corel Corporation | Temporary Files | Corel WordPerfect Overflow File | Corel WordPerfect X8 | Corel |
| .TV7 | Corel Corporation | Temporary Files | Corel WordPerfect Overflow File | Corel WordPerfect X8 | Corel |
| .TV9 | Corel Corporation | Temporary Files | Corel WordPerfect Overflow File | Corel WordPerfect X8 | Corel |
| .U96 | ConeXware | Temporary Files | EasyZip Temporary File | EasyZip | ConeXware |
| .VAF | Microsoft Corporation | Temporary Files | Microsoft Visual Studio Common Tools Analyzer Server Project Item File | Microsoft Visual Studio | Microsoft Corporation |
| .VMC | Microsoft Corporation | Temporary Files | Windows Virtual Machine Configuration File | VMware Workstation | VMware |
| .VSSCC | Microsoft Corporation | Temporary Files | Microsoft Visual Studio Temporary File | Microsoft Visual Studio | Microsoft Corporation |
| .W44 | dBase, LLC | Temporary Files | dBASE Temporary File | dBase | dBase, LLC |
| .WAF | Microsoft Corporation | Temporary Files | Internet Explorer For Mac Cache | Internet Explorer | Microsoft Corporation |
| .WTMP | Microsoft Corporation | Temporary Files | Microsoft Word For Mac 5 Temporary File | Microsoft Word | Microsoft Corporation |
| .XCUSERSTATE | Apple | Temporary Files | Xcode Data | Apple Xcode | Apple |
| ._MP | Flexera Software | Temporary Files | InstallShield Temporary Installer File | InstallShield | Flexera Software |
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