File Extensions

File Associations and Related File Types

File Extensions Beginning with "O"

.o Compiled C Object File
.oab Offline Address Book
.ob! Orbit Downloader Incomplete Download
.obj Wavefront 3D Object File
.obj Relocatable Object Code
.oca Custom Control Library Type File
.oce Open Catalog Extension Connection File
.ocr FAXGrapper Fax Text File
.ocx ActiveX Control
.odb ABAQUS Database
.odc OpenDocument Chart File
.odf OpenDocument Formula
.odf Open Document File
.odg OpenDocument Graphic File
.odi OpenDocument Image
.odif Open Document Interchange Format
.odm OpenDocument Master Document
.odm OverDrive Media File
.odp OpenDocument Presentation
.ods Outlook Express 5 Mailbox
.ods OpenDocument Spreadsheet
.odt OpenDocument Text Document
.odx BizTalk Server Orchestration File
.oeb Outlook Express Backup Wizard File
.ofc Open Financial Connectivity File
.off Object File Format
.ofl Ots File List
.ofm OmniForm Form
.ofm Melco Embroidery File
.oft Outlook File Template
.ofx Open Financial Exchange File
.oga Ogg Vorbis Audio File
.ogg Ogg Vorbis Audio File
.ogm Ogg Media File
.ognc Dynamic Web Page
.ogv Ogg Video File
.ogx Ogg Vorbis Multiplexed Media File
.okt Oktalyzer Module
.ola Online Access File
.olb OLE Object Library
.old Backup File
.oma Sony OpenMG Music File
.omcs Office Manager Access File
.omf Open Media Framework File
.omf OMF Interchange Image File
.omg OpenMG Audio File
.omo OMake Object File
.omp Office Manager Document Archive
.omx OtsAV Media Library Information File
.ond Lotus Notes Encapsulated Memo File
.one OneNote Document
.oo3 OmniOutliner 3 File
.opd OmniPage Document
.openbsd OpenBSD Readme File
.opf FlipAlbum File
.opf FlipViewer FlipBook File
.opml Outline Processor Markup Language File
.ops Office Profile Settings File
.opt Options File
.opx OrgPlus Org Chart
.opx FlipAlbum Photo Album File
.or2 Lotus Organizer 2 File
.or3 IBM Lotus Organizer 97 File
.or4 IBM Lotus Organizer 97 GS File
.or5 Lotus Organizer 5 File
.or6 Lotus Organizer 6 File
.ora OpenRaster Image File
.orf Olympus RAW File
.org Lotus Organizer File
.ori Original File
.ort Rich Text Editor Document
.orx RadiantOne VDS Database Schema
.os ObjectScript Source File
.ost Outlook Offline Data File
.osx PowerPC Executable File
.ota OTA Bitmap Image
.otb Nokia Over The Air Bitmap Image
.otc OpenDocument Chart Template
.otf OpenType Font
.otf OpenDocument Formula Template
.otf OpenTuft Tufting Design File
.otg OpenDocument Graphic Template
.oth OpenDocument HTML Template
.oti OpenDocument Image Template
.otl NoteTab Outline File
.otln Opal Outline File
.otp OpenDocument Presentation Template
.ots OpenDocument Spreadsheet Template
.ots OtsAV Album File
.ott OpenDocument Document Template
.ov2 TomTom Points of Interest Database
.ova Octava Musical Score
.ova Open Virtual Appliance
.ove Overture Musical Score
.ovf Open Virtualization File
.ovl Rollercoaster Tycoon 3 Data File
.ovpn OpenVPN Configuration File
.ovw Cubase WAVE Overview File
.owc OutWit Catch Database
.owg OutWit Gear Database
.owl OWL Source Code File
.owm OutWit XML Mashup File
.oxt Apache OpenOffice Extension
.oyx Approach Alternate Database Index