FileViewPro

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

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