List of File Formats (alphabetical) - O


Ext. Description Used by
O$$ Outfile Sprint
O Object file UNIX - Atari - GCC
O01 Typhoon vOice file AWAVE
OAZ Fax NetFax Manager
OB Object cut/paste file IBM LinkWay
OBD Microsoft Office Binder MSOffice
OBJ Compiled machine language code
OBJ Object code Intel Relocatable Object Module
OBJ Wavefront Object
OBJF Data Triangle strips object
OBR Object browser data file Borland C++
OBS Script ObjectScript
OBT Microsoft Office Binder Template MSOffice
OBV Visual interface ObjectScript
OBZ Microsoft Office Binder Wizard MSOffice
OCF Object Craft File Object Craft
OCR Incoming fax transcribed to text FAXGrapper
OCT Musical file Pctalizer
OCX New Custom Control's format in VB 4.0 Visual Basic
OCX OLE custom control
ODB OpenDocument database Base
ODF OpenDocument formula Math
ODG OpenDocument drawing Draw
ODIF Open Document Interchange Format
ODL Object Description Language
ODL Type library source Visual C++
ODM OpenDocument master document Writer
ODP OpenDocument presentation Impress
ODS OpenDocument spreadsheet Calc
ODT OpenDocument text document Writer
OFD Form definition ObjectView
OFF Object File Format vector graphics file
OFF Object File Format vector graphics
OFM PostScript font description file
OFN Microsoft Office documents Microsoft Office
OGG Ogg multimedia container format
OHB Source On Hand Basic
OHS Outbound History Bink/+
OIF QuickBase file format
OKT Music (8 channels) Oktalyzer
OKT Music format Oktalyzer
OLB Object library VAX
OLD Backup file
OLI Text file Olivetti
OLSR Configuration file olsrd
OMA Audio file Labelgate CD 2, MAGIQLIP2
OMG Audio file Sony compressed audio file (ATRAC3)
OMF Open Media Framework Avid Media Composer
OOF Data Outrage 3D Object Format (Descent)
OOG Data WEBOOGL 3D object
OOM Swap file Shroom
OPJ Origin Project File Origin version 4.1 and later
OPN Active options Exact
OPT Options name used by many programs for configuration information
OPT Delphi project options Borland Delphi
OPT Optimize support file QEMM
OPW Organization chart Org Plus for Windows
OPX Inactive options Exact
ORA Parameter file Oracle
ORC Orchestra MIDI file CSound
ORG Calendar file Lotus Organizer
ORG Older Origin Project Origin versions 4 or earlier
OTG OpenDocument drawing template Draw
OTB Over-the-air bitmap graphics
OTF Subtitle font information for media content Media players / software which support PGS subtitling
OTH OpenDocument HTML document template
OTL Outline font description Z-Soft Type Foundry
OTL Ventura Publisher's Type Foundry Outline Editor format
OTP OpenDocument presentation template Impress
OTS OpenDocument spreadsheet template Math
OTT OpenDocument text document template Writer
OTX Text file Olivetti Olitext Plus
OUT Output file
OUT Design II for Windows Output file
OV1 Overlay file (part of program to be loaded when needed)
OV2 Overlay file (part of program to be loaded when needed) TomTom Point of Interest
OVD Datafile ObjectVision
OVL Overlay file (part of program to be loaded when needed)
OVR Overlay file (part of program to be loaded when needed)
OXT extension

Read more about this topic:  List Of File Formats (alphabetical)