Список расширений имени файла/O

Примечание: Поскольку расширение имени файла может быть любым, представленный список не является полным.

Расширение	Описание	Программа
O	Object file	unix - Atari - GCC
O$$	Outfile	Sprint
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 Recolatable Object Module
OBJ	Wavefront 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
ODIF	Open Document Interchange Format
ODL	Object Description Language
ODL	Type library source	Visual C++
ODT	OpenDocument Text File	OpenOffice Writer
OFD	Form definition	ObjectView
OFF	Object File Format vector graphics
OFF	Object File Format vector graphics file
OFM	PostScript font description file
OFN	MS Office documents	MSOffice
OHS	Outbound History	Bink/+
OKT	Music (8 channels)	Oktalyzer
OKT	Music format	Oktalyzer
OLB	Object library	VAX
OLD	Backup file
OLI	Text file	Olivetti
OMA	Звук в формате Atrac	Sony Sonic Stage
OOM	Swap file	Shroom
OPN	Active options	Exact
OPT	Delphi project options	Borland Delphi
OPT	Optimize support file	QEMM
OPT	Options name used by many programs for configuration information
OPW	Organization chart	Org Plus for Windows
OPX	Inactive options	Exact
ORA	Parameter file	Oracle
ORG	Calendar file	Lotus Organizer
ORG	Origin plot	Microcal Origin
OTF	Шрифт OpenType
OTL	Outline font description	Z-Soft Type Foundry
OTL	Ventura Publisher's Type Foundry Outline Editor format
OTX	Text file	Olivetti Olitext Plus
OUT	Output file
OV1	Overlay file (part of program to be loaded when needed)
OV2	Overlay file (part of program to be loaded when needed)
OVD	Datafile	ObjectVision
OVE	Файл с запись нот	Cakewalk Overture
OVL	Overlay file (part of program to be loaded when needed)
OVR	Overlay file (part of program to be loaded when needed)