.BTR | Pervasive Software | 資料庫檔案 | Btrieve Database File | Microsoft FrontPage | Microsoft Corporation |
.BUT | ACD Systems | 不常見的文件 | Canvas Web Button (CD Audio Track) | ACD Systems Canvas | Microsoft Corporation |
.CAB | Microsoft Corporation | 系統檔案 | Windows Cabinet File | Windows Installer | Microsoft Corporation |
.CAG | Microsoft Corporation | 向量圖像檔案 | ClipArt Gallery Package | Microsoft PowerPoint | Microsoft Corporation |
.CAL | Newera Software Technology, Inc. | 光柵圖像檔案 | CALS Raster File | Microsoft Outlook | Microsoft Corporation |
.CAMP | Microsoft Corporation | 設置檔案 | WCS Color Appearance Model Profile File | Microsoft Windows | Microsoft Corporation |
.CAP | Microsoft Corporation | 資料檔案 | Network Monitor Packet Capture Data File | Microsoft Network Monitor | Microsoft Corporation |
.CAT | Microsoft Corporation | 系統檔案 | Windows Catalog File | Microsoft Windows | Microsoft Corporation |
.CA_ | Microsoft Corporation | 壓縮檔案 | Microsoft Cabinet File | Microsoft Windows | Microsoft Corporation |
.CB | Microsoft Corporation | 系統檔案 | Microsoft Clean Boot File | Microsoft Windows | Microsoft Corporation |
.CBO | Microsoft Corporation | 資料檔案 | Microsoft Interactive Training File | Microsoft Windows | Microsoft Corporation |
.CBT | Various Developers | 壓縮檔案 | Comic Book TAR File | Microsoft Support | Microsoft Corporation |
.CC | Don Ho | 開發商檔案 | C/C++ Source Code File | Microsoft Visual Studio | Microsoft Corporation |
.CC2 | Briggs Softworks | 資料檔案 | Calendar Commander Calendar Data | Microsoft Notepad | Microsoft Corporation |
.CCA | IBM | 資料檔案 | Cc:Mail Archive File | Microsoft Importer for Lotus ccMail Archives | Microsoft Corporation |
.CCH | Microsoft Corporation | 不常見的文件 | .NET Security Resolution Cache File | Microsoft .NET Framework | Microsoft Corporation |
.CD | Microsoft Corporation | 開發商檔案 | Visual Studio Class Diagram | Microsoft Visual Studio | Microsoft Corporation |
.CDA | Microsoft Corporation | 音頻檔案 | CD Audio Track Shortcut | Microsoft Windows Media Player | Microsoft Corporation |
.CDAT | Microsoft Corporation | 不常見的文件 | Internet Security And Acceleration (ISA) Server Cache File | Microsoft Internet Security and Acceleration (ISA) | Microsoft Corporation |
.CDB | Nokia | 資料庫檔案 | Symbian Phonebook Database | Microsoft ActiveSync | Microsoft Corporation |
.CDDA | Microsoft Corporation | 音頻檔案 | CD Digital Audio File | Logic Express | Microsoft Corporation |
.CDF | Wolfram Research | 頁面佈局檔案 | Computable Document Format File | Internet Explorer | Microsoft Corporation |
.CDF-MS | Microsoft Corporation | 不常見的文件 | ClickOnce Compiled Manifest File | Microsoft ClickOnce | Microsoft Corporation |
.CDMP | Microsoft Corporation | 系統檔案 | WCS Device Model Profile | Microsoft Windows | Microsoft Corporation |
.CDR | Corel | 向量圖像檔案 | CorelDRAW Vector Image File | Microsoft Windows Media Player | Microsoft Corporation |
.CDX | Microsoft Corporation | 資料檔案 | Compound Index File | Microsoft Visual FoxPro | Microsoft Corporation |
.CDXML | PerkinElmer | 資料檔案 | ChemDraw XML File | Microsoft Windows PowerShell | Microsoft Corporation |
.CEL | Affymetrix | 資料檔案 | Affymetrix Probe Results File | Microsoft Notepad | Microsoft Corporation |
.CELX | Open Source | 可執行檔案 | Celestia Script File | Microsoft Notepad | Microsoft Corporation |
.CER | Microsoft Corporation | 網絡文件 | Internet Security Certificate | Internet Explorer | Microsoft Corporation |
.CF | Proofpoint, Inc. | 設置檔案 | Sendmail Configuration File | Microsoft Notepad | Microsoft Corporation |
.CFB | Microsoft Corporation | 資料檔案 | Compound Binary File | Microsoft Visual Studio | Microsoft Corporation |
.CFG | Unknown Developer | 開發商檔案 | Configuration File | Microsoft Notepad | Microsoft Corporation |
.CFK | Microsoft Corporation | 不常見的文件 | Microsoft Developer Studio Diagram File | Microsoft Visual Studio | Microsoft Corporation |
.CFL | Corel Corporation | 不常見的文件 | Corel Flow Flow Chart File | Microsoft Visual Studio | Microsoft Corporation |
.CGI | Unknown Developer | 可執行檔案 | Common Gateway Interface Script | Microsoft Notepad | Microsoft Corporation |
.CH3 | Harvard Graphics | 頁面佈局檔案 | Harvard Graphics DOS Chart File | ACD Systems Canvas | Microsoft Corporation |
.CHART | Interscape | 文字檔 | Feedback Chart File | Microsoft Notepad | Microsoft Corporation |
.CHESSTITANSSAVE-MS | Microsoft Corporation | 遊戲檔案 | Chess Titans Saved Game | Microsoft Windows | Microsoft Corporation |
.CHG | Quicken | 資料檔案 | Quicken Online Data File | Microsoft Windows | Microsoft Corporation |
.CHI | Microsoft Corporation | 資料檔案 | Microsoft Help File Index | Microsoft Visual FoxPro | Microsoft Corporation |
.CHK | Sophos | 資料檔案 | InterCheck Checksum Database | Internet Explorer | Microsoft Corporation |
.CHL | Leadtek Research | 設置檔案 | WinFast PVR2 Channel List | Internet Explorer | Microsoft Corporation |
.CHM | Microsoft Corporation | 網絡文件 | Compiled HTML Help File | Microsoft HTML Help Workshop | Microsoft Corporation |
.CHORD | Open Source | 文字檔 | Song Chords File | Microsoft Word | Microsoft Corporation |
.CHS | Microsoft Corporation | 系統檔案 | Windows Chinese Noise-Word List File | Microsoft Windows | Microsoft Corporation |
.CHT | Nintendo | 遊戲檔案 | SNES Cheat File | Microsoft Notepad | Microsoft Corporation |
.CI | Microsoft Corporation | 系統檔案 | Windows Content Indexer Catalog File | Microsoft Windows | Microsoft Corporation |
.CIK | Corel | 設置檔案 | Corel Graphics 10 Custom Dual Tone File | Microsoft Notepad | Microsoft Corporation |
.CIL | Symantec Corporation | 資料檔案 | Norton CleanSweep Installation Log File | Microsoft Notepad | Microsoft Corporation |
.CKP | Microsoft Corporation | 資料庫檔案 | SQL Server Checkpoint File | Microsoft SQL Server | Microsoft Corporation |
.CKS | Microsoft Corporation | 設置檔案 | Microsoft Windows CE Image Info Data | Microsoft Windows CE Embedded | Microsoft Corporation |
.CLB | Microsoft Corporation | 系統檔案 | COM+ Catalog File | Microsoft COM+ | Microsoft Corporation |
.CLC | Microsoft Corporation | 資料檔案 | Microsoft Schedule+ 7 Habits Mission Statement Data | Microsoft Schedule Plus | Microsoft Corporation |
.CLG | Microsoft Corporation | 系統檔案 | Windows Catalog File | Microsoft Windows | Microsoft Corporation |
.CLN | Microsoft Corporation | 備份檔案 | Microsoft Windows 3.x Configuration Backup File | Microsoft Windows 3.x | Microsoft Corporation |
.CLW | Microsoft Corporation | 開發商檔案 | Visual C++ ClassWizard File | Microsoft Visual C++ | Microsoft Corporation |
.CLX | IBM | 資料檔案 | Rational XDE | Microsoft Outlook | Microsoft Corporation |
.CM0013 | Samsung Electronics | 系統檔案 | Samsung Smart TV Index File | Microsoft Word | Microsoft Corporation |
.CMD | Microsoft Corporation | 可執行檔案 | Windows Command File | Microsoft Notepad | Microsoft Corporation |
.CMN | Microsoft Corporation | 資料檔案 | Systems Management Server (SMS) Update | Microsoft Systems Management Server | Microsoft Corporation |
.CMO | ASUS | 系統檔案 | ASUS BIOS File | Microsoft Windows | Microsoft Corporation |
.CMP | Microsoft Corporation | 設置檔案 | Windows Connection Manager Profile | Microsoft Windows Server 2016 | Microsoft Corporation |
.CMS | Opera Software | 網絡文件 | Content Management System Web Page File | Internet Explorer | Microsoft Corporation |
.CMX | Corel | 向量圖像檔案 | Corel Metafile Exchange Image File | ACD Systems Canvas | Microsoft Corporation |
.CNF | MySQL AB | 設置檔案 | MySQL Configuration File | Windows Telnet | Microsoft Corporation |
.CNT | Microsoft Corporation | 系統檔案 | Help Contents File | Microsoft HTML Help Workshop | Microsoft Corporation |
.CNV | ACD Systems | 向量圖像檔案 | Canvas Drawing File | ACD Systems Canvas | Microsoft Corporation |
.CN_ | Microsoft Corporation | 壓縮檔案 | Compressed Windows Help Content | Microsoft Windows | Microsoft Corporation |
.COD | Unknown Developer | 開發商檔案 | Compiled Source Code | Microsoft Visual Studio | Microsoft Corporation |
.COL | Open Source | 資料檔案 | Bibexcel File | Microsoft Multiplan | Microsoft Corporation |
.COM | Microsoft Corporation | 可執行檔案 | DOS Command File | Microsoft Windows | Microsoft Corporation |
.COMFYCAKESSAVE-MS | Microsoft Corporation | 遊戲檔案 | Comfy Cakes Saved Game File | Comfy Cakes | Microsoft Corporation |
.COMPOSITEFONT | Microsoft Corporation | 字體檔案 | Windows Composite Font File | Microsoft XML Notepad | Microsoft Corporation |
.CONF | Unknown Developer | 設置檔案 | Generic Configuration File | Microsoft Notepad | Microsoft Corporation |
.CONFIG | Unknown Developer | 開發商檔案 | Configuration File | Microsoft Notepad | Microsoft Corporation |
.CONTACT | Microsoft Corporation | 資料檔案 | Windows Contact File | Microsoft Windows | Microsoft Corporation |
.COO | Autodesk, Inc. | 文字檔 | AutoCAD Bounding Coordinates Cookie | Microsoft Notepad | Microsoft Corporation |
.COV | Microsoft Corporation | 頁面佈局檔案 | Fax Cover Page File | Microsoft Fax Cover Page Editor | Microsoft Corporation |
.COVERAGE | Microsoft Corporation | 資料檔案 | Visual Studio Code Coverage Report | Microsoft Visual Studio | Microsoft Corporation |
.COVERAGEXML | Microsoft Corporation | 資料檔案 | Microsoft Visual Studio Code Coverage File | Microsoft Visual Studio | Microsoft Corporation |
.CPC | Cartesian Products, Inc. | 光柵圖像檔案 | CPC Compressed Image File | Internet Explorer | Microsoft Corporation |
.CPE | Microsoft Corporation | 頁面佈局檔案 | Fax Cover Page File | Microsoft Fax Cover Page Editor | Microsoft Corporation |
.CPF | IBM | 資料檔案 | Cognos Project File | Microsoft Makecab | Microsoft Corporation |
.CPI | Sony | 視頻檔案 | AVCHD Video Clip Information | MS-DOS | Microsoft Corporation |
.CPK | CRI Middleware | 遊戲檔案 | CRI Middleware Package | Microsoft Winqual Submission Tool | Microsoft Corporation |
.CPL | Microsoft Corporation | 系統檔案 | Windows Control Panel Item | Microsoft Windows | Microsoft Corporation |
.CPN | Microsoft Corporation | 遊戲檔案 | Age Of Mythology Campaign File | Age of Empires II | Microsoft Corporation |
.CPP | Open Source | 開發商檔案 | C++ Source Code File | Microsoft Visual Studio | Microsoft Corporation |
.CPQ | Compaq | 系統檔案 | Compaq OEM Disc Configuration File | Microsoft Notepad | Microsoft Corporation |
.CPR | Steinberg | 音頻檔案 | Cubase Project | Microsoft Notepad | Microsoft Corporation |
.CPT | Corel | 光柵圖像檔案 | Corel Photo-Paint Image | Microsoft ActiveSync | Microsoft Corporation |
.CR2 | Canon Inc. | 相機原始文件 | Canon Digital Camera Raw Image File | Microsoft Windows Photos | Microsoft Corporation |
.CRD | Open Source | 不常見的文件 | Guitar Tabs | Microsoft Word | Microsoft Corporation |
.CRDS | Microsoft Corporation | 備份檔案 | Windows CardSpace Backup File | Microsoft Windows 7 | Microsoft Corporation |
.CRL | Various Developers | 網絡文件 | Certificate Revocation List File | Microsoft IIS | Microsoft Corporation |
.CRT | Mozilla | 網絡文件 | Security Certificate | Internet Explorer | Microsoft Corporation |
.CRTX | Microsoft Corporation | 資料檔案 | Office 2007 Chart Template File | Microsoft Excel | Microsoft Corporation |
.CRW | Canon Inc. | 相機原始文件 | Canon Raw CIFF Image File | Microsoft Windows Photos | Microsoft Corporation |
.CS | Microsoft Corporation | 開發商檔案 | C# Source Code File | Visual Studio Code | Microsoft Corporation |