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O File Extensions

File Extension File Type Popularity
.OTFOpenType Font
.ODTOpenDocument Text Document
.OBJWavefront 3D Object File
.ORIGOriginal File
.ODPOpenDocument Presentation
.OPDOWNLOADOpera Partially Downloaded File
.OUTOutput File
.OBIOutlook RSS Subscription File
.OSMOpenStreetMap Map File
.OFXOpen Financial Exchange File
.OTRKEYOnlineTvRecorder Encoded Video File
.OV2TomTom Points of Interest Database
.OPMLOutline Processor Markup Language File
.OSDXSearch Connector Description File
.ODSOpenDocument Spreadsheet
.ORAOracle Database Configuration File
.OSZOsu! Beatmap File
.OMFOpen Media Framework File
.OCXActiveX Control
.OGVOgg Video File
.OGGOgg Vorbis Audio File
.OVFOpen Virtualization File
.OEACCOUNTWindows Mail Account File
.OMGImage File
.OLDBackup File
.OBKBackup File
.OBML16Opera Mini Saved Web Page
.OVAOpen Virtual Appliance
.OLK14MESSAGEOutlook Message File
.OBDOffice Binder Document
.OGXOgg Vorbis Multiplexed Media File
.OSCOpenStreetMap Change File
.OGAOgg Vorbis Audio File
.OUTCompiled Executable File
.OCTRadiance Octree File
.OEMOEM Setup File
.OVWLogic Pro Overview File
.OBMLOpera Mini Saved Web Page
.OSSMicrosoft Outlook Saved Search File
.ONEPKGMicrosoft OneNote Package File
.OXTApache OpenOffice Extension
.OR6Lotus Organizer 6 File
.ODBOpenDocument Database
.ODCOffice Data Connection File
.OMPOffice Manager Document Archive
.OPFOpen Packaging Format File
.OSTOutlook Offline Folder File
.OTMOutlook Macro File
.ONETOC2Microsoft OneNote Table of Contents File
.OGFS.T.A.L.K.E.R. Model File
.OQYExcel OLAP Query File
.OCTESTXcode Objective-C Unit Test Bundle
.ORAOpenRaster Image File
.OLMMac Outlook Database File
.OPLCNokia Operator Logo File
.OBBAndroid Opaque Binary Blob File
.OBWSuperior Drummer Sounds File
.OZBMU Online Image File
.OVHOMSI Vehicle Configuration File
.OLValve Hammer Object Layout File
.OFFICEUIMicrosoft Office UI Customization File
.OLPOffice Live Package
.OIVOpenIV Mod Package File
.ODTTFObfuscated OpenType Font
.OWXOutWit Hub Automator File
.OMPOpenMind Windows Document
.OBML15Opera Mini Saved Web Page
.OSKOsu! Skin File
.OPJOrCAD Project File
.OMODOblivion Mod Archive
.OSROsu! Replay File
.OSZOpenLP Service File
.ONTtheWord Bible Text Module
.OTtheWord Old Testament Text Module
.ONTXtheWord Encrypted Bible Text Module
.OTXtheWord Encrypted Old Testament Text Module
.OC5openCanvas 5 Event File
.OCIopenCanvas Image
.OC3openCanvas 3 Event File
.OC4openCanvas 4 Event File
.OFMMelco Embroidery File
.OAMAdobe Edge Animate Widget File
.ODLObject Description Language File
.OATAndroid Optimized Application File
.OTAOTA Bitmap Image
.OTHOpenDocument HTML Template
.OTPOpenDocument Presentation Template
.OMFOMF Interchange Image File
.OGNCDynamic Web Page
.OMGOpenMG Audio File
.OTTOpenDocument Document Template
.OVEOverture Musical Score
.ODGOpenDocument Graphic File
.OPXFlipAlbum Photo Album File
.OFFObject File Format
.ODMOverDrive Media File
.ODFOpenDocument Formula
.OTSOpenDocument Spreadsheet Template
.ODXBizTalk Server Orchestration File
.ODEXOptimized Dalvik Executable
.OPXOrgPlus Org Chart
.OGMOgg Media File
.OABOffline Address Book
.OYXApproach Alternate Database Index
.OBJRelocatable Object Code
.OCompiled Object File
.OO3OmniOutliner 3 File
.OTLNOpal Outline File
.ORFOlympus RAW File
.OMOOMake Object File
.OLAOnline Access File
.OCACustom Control Library Type File
.OPTOptions File
.OPSOffice Profile Settings File
.OFCOpen Financial Connectivity File
.OKTOktalyzer Module
.ORIOriginal File
.OTSOtsAV Album File
.OEBOutlook Express Backup Wizard File
.OMXOtsAV Media Library Information File
.OB!Orbit Downloader Incomplete Download
.ONEOneNote Document
.OPDOmniPage Document
.OVPNOpenVPN Configuration File
.OLBOLE Object Library
.OWLOWL Source Code File
.OFTOutlook File Template
.OTLNoteTab Outline File
.OMASony OpenMG Music File
.ONDLotus Notes Encapsulated Memo File
.OFLOts File List
.OO3TEMPLATEOmniOutliner Template
.OLLTrialDirector Object Load List
.OEMOEMEdit Save File
.OCRSubtitle Workshop OCR Script
.OPOpenPAT Report
.OB2Oberon-2 Source Code File
.OLK14CATEGORYOutlook Category File
.ODSOutlook Express 5 Mailbox
.OPEICOOpeico Text File
.OTZOpenLP Theme File
.OTBNokia Over The Air Bitmap Image
.OPDDurango Document
.OTFOpenDocument Formula Template
.OPFFlipAlbum File
.OTGOpenDocument Graphic Template
.OSCObix Source Code File
.OZJMU Online Image File
.OZTMU Online Image File
.OPALMicrosoft Office User Settings File
.ORGLotus Organizer File
.ORXRadiantOne VDS Database Schema
.OP4Nastran Output File
.OSObjectScript Source File
.OVOLOGooVoo Log File
.OSUOsu! Script
.ODMOpenDocument Master Document
.OCCOceanic DataPool File
.OTIOpenDocument Image Template
.ODIOpenDocument Image
.OCRFAXGrapper Fax Text File
.OEBZIPZipped Open eBook File
.OPUSOpus Audio File
.ODCOpenDocument Chart File
.OP2Nastran Output File
.OWCOutWit Catch Database
.OZOpera Job Management Compressed File
.OSPOpenShot Project File
.OEXOpera Extension
.OPFFlipViewer FlipBook File
.OSAXAppleScript Scripting Addition
.OBPBryce Object File
.OLK14NOTEOutlook Note File
.OEBOpen eBook File
.OLK14GROUPOutlook Group File
.OLK14EVENTOutlook Calendar Event File
.OLK14CONTACTOutlook Contact File
.OPTSLinux Configuration Options File
.ORDEREDTESTVisual Studio Ordered Test File
.OMCSOffice Manager Access File
.OR4IBM Lotus Organizer 97 GS File
.OR5Lotus Organizer 5 File
.OWGOutWit Gear Database
.OCEOpen Catalog Extension Connection File
.ORTRich Text Editor Document
.OAROpenSimulator Archive
.OBZCompressed 3D Object File
.OTFOpenTuft Tufting Design File
.OVAOctava Musical Score
.OGZCube 2 Map File
.OLK14SIGNATUREOutlook Signature File
.OFROptimFROG Audio File
.OFMOmniForm Form
.OVRThe Overlay Maker Overlay File
.OVPThe Overlay Maker Package File
.OBTOpenbox Theme File
.OLBOrCAD Symbol Library File
.OVWCubase WAVE Overview File
.OPAXMicrosoft Office User Settings File
.OWMOutWit XML Mashup File
.OSBOpenStreetMap Binary Map File
.OLK14MAILACCOUNTOutlook Mail Account File
.OVLRollercoaster Tycoon 3 Data File
.OLKOutlook Address Book File
.OLTOrbit Downloads List
.OTCOpenDocument Chart Template
.OXYGENEOxygene Project File
.OLK14MSGSOURCEOutlook Email Message Data File
.OWFree Pascal 1.0.x Object File
.OPENBSDOpenBSD Readme File
.OPTOpterecenja File
.OR2Lotus Organizer 2 File
.OGSOrigons Movie Data File
.OR3IBM Lotus Organizer 97 File
.ORCVoyetra Digital Orchestrator File
.OPTAGT Game Data File
.ODOOnline Operating System Write Document
.OLK14PREFOutlook Preferences File
.OPTIONSSE-SOFT Configuration File
.OOKArachne Batch Script
.ORVOracom Video File
.OREOre Executable File
.ODFOpen Document File
.ODFBattlezone Object Definition File
.ODIFOpen Document Interchange Format
.OFRSMS Offer Manager File
.OLK14TASKOutlook Task File
.ODMascopt Graph Request File
.OSXPowerPC Executable File