File Extension Listing for "O"

OObject file (Atari)
OObject file (Unix)
OASWord processor document (Fujitsu OAS)(Japanese)
OAZFax (NetFax Manager)
OBABF Outlook Backup file
OBDBinder (Microsoft Office)
OBJObject file
OBRObject browser data file (Borland C++)
OBSScript (ObjectScript)
OBVVisual interface (ObjectScript)
OBZBinder Wizard (Microsoft Office)
OCFObject craft file (Object Craft)
OCRTranscribed fax-to-text file (FAXGrabber)
OCXOLE custom control
ODCOpenDocument Chart
ODFObject Description Files
ODFOpen Document Format
ODGOpenDocument Graphic
ODIOpenDocument Image
ODIFOpenDocument Interchange Format
ODLType library source (Visual C++)
ODPOpenDocument Presentation file
ODSOpenDocument Spreadsheet
ODTOpenDocument Text file
OFDForm definition (ObjectView)
OFFObject File (3D Mesh)
OFNFileNew file (Microsoft Office)
OFTTemplate (Microsoft Outlook)
OGGOgg Vorbis audio file
OGMOgg Media video file
OKRFeldeinteilung module file (3-D Fassade Plus)
OKTMusic module (MOD) (Oktalyzer)
OLBObject library (VAX)
OLDBackup file (Generic)
OLEObject Linking and Embedding (OLE) custom control (Microsoft)
OLIText file (Olivetti)
OMCAtrac3 (Sony Music Store) audio file
OMFOpen Media Format File
ONEMicrosoft OneNote 2007 file
ONESEMONE Compressed Archive
OO1Voice file (Typhoon)
OOGLObject Oriented Graphics Library
OOMSwap file (Shroom)
OPJProject file (Orcad Schematic Capture)
OPLOrganiser Programming Language source file (Psion/Symbian)
OPNActive options (Exact)
OPOOutput executable file (OPL)
OPTOptimize support file (QEMM)
OPTDeveloper Studio file (Microsoft)
OPWOrganization chart (Org Plus for Windows)
OPXInactive options (Exact)
OPXExtension DLL (OPL)
OR2Calendar file (Lotus Organizer 2)
OR3Lotus Organizer 97 file
ORAConfiguration file (Oracle 7)
ORAParameter file (Oracle)
ORCScript (Oracle 7)
ORGCalendar file (Lotus Organizer)
OSSSearch file (Microsoft Office)
OSTOffline file (Microsoft Exchange/Outlook)
OTGOpenDocument Graphic Template
OTIOpenDocument Image Template
OTLTemplate file (Super NoteTab) (Fookes)
OTLOutline font description (Z-Soft Type Foundry)
OTTOpenDocument Text Template
OTXText file (Olivetti Olitext Plus)
OUTOutput file (Microsoft C)
OVDatabase file (Revelation-DOS)
OV1Overlay file
OV2Overlay file
OVDDatafile (ObjectVision)
OVLOverlay file
OVROverlay file extension

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