.O | Microsoft Corporation | Arquivos de desenvolvedor | Compiled Object File | Microsoft Visual Studio | Microsoft Corporation |
.OAB | Microsoft Corporation | Arquivos de dados | Offline Address Book | Microsoft Outlook | Microsoft Corporation |
.OBD | Microsoft Corporation | Arquivos de dados | Office Binder Document | Microsoft Office | Microsoft Corporation |
.OBI | Microsoft Corporation | Arquivos de configuração | Outlook RSS Subscription File | Microsoft Outlook 2016 | Microsoft Corporation |
.OBT | Open Source | Arquivos de configuração | Openbox Theme File | Microsoft Binder | Microsoft Corporation |
.OCA | Microsoft Corporation | Arquivos de desenvolvedor | Custom Control Library Type File | Microsoft Visual Basic | Microsoft Corporation |
.OCR | URUWORKS | Arquivos miscelâneas | Subtitle Workshop OCR Script | Microsoft Notepad | Microsoft Corporation |
.OCSMEET | Microsoft Corporation | Arquivos de dados | Microsoft Lync Data | Microsoft Lync | Microsoft Corporation |
.OCX | Microsoft Corporation | Arquivos de desenvolvedor | ActiveX Control | Microsoft Visual Studio | Microsoft Corporation |
.OC_ | Microsoft Corporation | Arquivos comprimidos | Compressed ActiveX Control File | Microsoft Windows | Microsoft Corporation |
.ODC | Microsoft Corporation | Arquivos de configuração | Office Data Connection File | Microsoft Excel | Microsoft Corporation |
.ODCDATABASEFILE | Microsoft Corporation | Arquivos de dados | Microsoft Office File | Microsoft Office | Microsoft Corporation |
.ODCTABLECOLLECTIONFILE | Microsoft Corporation | Arquivos de dados | Microsoft Office Component | Microsoft Office | Microsoft Corporation |
.ODCTABLEFILE | Microsoft Corporation | Arquivos de dados | Microsoft Office File | Microsoft Office | Microsoft Corporation |
.ODF | Oracle Corporation | Arquivos miscelâneas | OpenDocument Formula | Microsoft Notepad | Microsoft Corporation |
.ODL | Microsoft Corporation | Arquivos de desenvolvedor | Object Description Language File | Microsoft Visual Studio | Microsoft Corporation |
.ODP | Oracle Corporation | Arquivos de dados | OpenDocument Presentation | Microsoft PowerPoint | Microsoft Corporation |
.ODS | Oracle Corporation | Arquivos de planilha | OpenDocument Spreadsheet | Microsoft Excel | Microsoft Corporation |
.ODT | Oracle Corporation | Arquivos de Texto | OpenDocument Text Document | Microsoft Word | Microsoft Corporation |
.OEACCOUNT | Microsoft Corporation | Arquivos de dados | Windows Mail Account File | Microsoft Mail | Microsoft Corporation |
.OEM | Microsoft Corporation | Arquivos de configuração | Original Equipment Manufacturer Setup File | Microsoft Windows | Microsoft Corporation |
.OFC | Microsoft Corporation | Arquivos de dados | Open Financial Connectivity File | Microsoft Money | Microsoft Corporation |
.OFFICEUI | Microsoft Corporation | Arquivos de configuração | Microsoft Office UI Customization File | Microsoft Office | Microsoft Corporation |
.OFN | Microsoft Corporation | Arquivos de dados | Systems Management Server Offer Creation Notification File | Microsoft Systems Management Server | Microsoft Corporation |
.OFT | Microsoft Corporation | Arquivos de dados | Outlook File Template | Microsoft Outlook | Microsoft Corporation |
.OFX | Intuit, Inc. | Arquivos de dados | Open Financial Exchange File | Microsoft Money | Microsoft Corporation |
.OGX | Xiph.Org | Arquivos de vídeo | Ogg Vorbis Multiplexed Media File | Microsoft Windows Media Player | Microsoft Corporation |
.OHP | Microsoft Corporation | Arquivos de dados | MS-DOS 7 File | MS-DOS | Microsoft Corporation |
.OLB | Microsoft Corporation | Arquivos miscelâneas | OLE Object Library | Microsoft Excel | Microsoft Corporation |
.OLE | Microsoft Corporation | Arquivos de dados | Microsoft Object Linking And Embedding Data | Microsoft Windows | Microsoft Corporation |
.OLK | Microsoft Corporation | Arquivos de dados | Outlook Address Book File | Microsoft Word | Microsoft Corporation |
.OLM | Microsoft Corporation | Arquivos de dados | Mac Outlook Database File | Microsoft Outlook 2016 | Microsoft Corporation |
.OLS | Microsoft Corporation | Arquivos de dados | Microsoft Office List Shortcut | Microsoft Office | Microsoft Corporation |
.OMP | MatchWare | Arquivos de layout de página | OpenMind Windows Document | Microsoft Access | Microsoft Corporation |
.ONE | Microsoft Corporation | Arquivos de dados | OneNote Document | Microsoft OneNote | Microsoft Corporation |
.ONEBIN | Microsoft Corporation | Arquivos Temporários | OneNote Data | Microsoft OneNote | Microsoft Corporation |
.ONECACHE | Microsoft Corporation | Arquivos Temporários | Microsoft OneNote Cache File | Microsoft OneNote | Microsoft Corporation |
.ONEPKG | Microsoft Corporation | Arquivos de cópia | Microsoft OneNote Package File | Microsoft OneNote | Microsoft Corporation |
.ONETOC | Microsoft Corporation | Arquivos de configuração | Microsoft OneNote Table Of Contents | Microsoft OneNote | Microsoft Corporation |
.ONETOC2 | Microsoft Corporation | Arquivos de configuração | Microsoft OneNote Table Of Contents File | Microsoft OneNote | Microsoft Corporation |
.OPS | Microsoft Corporation | Arquivos de configuração | Office Profile Settings File | Microsoft Office | Microsoft Corporation |
.OPT | LexisNexis | Arquivos de banco de dados | Concordance Database File | Microsoft Visual Studio | Microsoft Corporation |
.OPUS | Open Source | Arquivos de áudio | Opus Audio File | Microsoft Windows Media Player | Microsoft Corporation |
.OPX | Insperity Business Services | Arquivos de dados | OrgPlus Organizational Chart | Microsoft Office | Microsoft Corporation |
.OQY | Microsoft Corporation | Arquivos de banco de dados | Excel OLAP Query File | Microsoft Excel | Microsoft Corporation |
.ORDEREDTEST | Microsoft Corporation | Arquivos de desenvolvedor | Visual Studio Ordered Test File | Microsoft Visual Studio | Microsoft Corporation |
.ORF | Olympus Corporation | Arquivos Câmera Raw | Olympus RAW File | ACD Systems Canvas | Microsoft Corporation |
.ORP | PV & Associates | Arquivos de dados | WinSLAM File | Microsoft Translator | Microsoft Corporation |
.OSC | OpenStreetMap | Arquivos GIS | OpenStreetMap Change File | Microsoft Windows | Microsoft Corporation |
.OSD | Microsoft Corporation | Arquivos de dados | Open Software Description Data | Microsoft Application Virtualization | Microsoft Corporation |
.OSDX | Microsoft Corporation | Arquivos de configuração | Search Connector Description File | Microsoft Windows | Microsoft Corporation |
.OSS | Microsoft Corporation | Arquivos de configuração | Microsoft Outlook Saved Search File | Microsoft Outlook | Microsoft Corporation |
.OST | Microsoft Corporation | Arquivos miscelâneas | Outlook Offline Data File | Microsoft Outlook 2016 | Microsoft Corporation |
.OTM | Microsoft Corporation | Arquivos executáveis | Outlook Macro File | Microsoft Word | Microsoft Corporation |
.OTP | Oracle Corporation | Arquivos de dados | OpenDocument Presentation | Microsoft PowerPoint | Microsoft Corporation |
.OUT | Open Source | Arquivos executáveis | Compiled Executable File | Microsoft Notepad | Microsoft Corporation |
.OV3 | Microsoft Corporation | Arquivos de sistema | DOS Overlay File | MS-DOS | Microsoft Corporation |
.OXPS | Microsoft Corporation | Arquivos de layout de página | OpenXPS File | Microsoft XPS Viewer | Microsoft Corporation |