| O |
Object
file (Unix) |
| O |
Object
file (Atari) |
| O |
Object
file (GCC) |
| OAS |
Word
processor document (Fujitsu OAS)(Japanese) |
| OAZ |
Fax
(NetFax Manager) |
| OB |
Object
cut/paste file (IBM LinkWay) |
| OBD |
Binder
template (Microsoft Office) |
| OBD |
Binder
(Microsoft Office) |
| OBJ |
Object
file |
| OBR |
Object
browser data file (Borland C++) |
| OBS |
Script
(ObjectScript) |
| OBV |
Visual
interface (ObjectScript) |
| OBZ |
Binder
Wizard (Microsoft Office) |
| OCF |
Object
craft file (Object Craft) |
| OCR |
Transcribed
fax-to-text file (FAXGrabber) |
| OLE |
Object
Linking and Embedding (OLE) custom control (Microsoft) |
| ODL |
Type
library source (Visual C++) |
| ODS |
Mailbox
file (Microsoft Outlook Express) |
| OFD |
Form
definition (ObjectView) |
| OFF |
Object
File (3D Mesh) |
| OFN |
FileNew
file (Microsoft Office) |
| OFT |
Template
(Microsoft Outlook) |
| OKR |
Feldeinteilung
module file (3-D Fassade Plus) |
| OKT |
Music
module (MOD) (Oktalyzer) |
| OLB |
Object
Library (OLE) (Microsoft) |
| OLB |
Object
library (VAX) |
| OLD |
Backup
file (Generic) |
| OLE |
OLE
object |
| OLI |
Text
file (Olivetti) |
| OO1 |
Voice
file (Typhoon) |
| OOGL |
Object
Oriented Graphics Library |
| OOM |
Swap
file (Shroom) |
| OPJ |
Project
file (Orcad Schematic Capture) |
| OPL |
Organiser
Programming Language source file (Psion/Symbian) |
| OPN |
Active
options (Exact) |
| OPO |
Output
executable file (OPL) |
| OPT |
Developer
Studio file (Microsoft) |
| OPT |
Optimize
support file (QEMM) |
| OPW |
Organization
chart (Org Plus for Windows) |
| OPX |
Extension
DLL (OPL) |
| OPX |
Inactive
options (Exact) |
| ORA |
Parameter
file (Oracle) |
| ORC |
Script
(Oracle 7) |
| ORG |
Calendar
file (Lotus Organizer) |
| OR2 |
Calendar
file (Lotus Organizer 2) |
| OR3 |
Lotus
Organizer 97 file |
| ORA |
Configuration
file (Oracle 7) |
| OSS |
Search
file (Microsoft Office) |
| OST |
Offline
file (Microsoft Exchange/Outlook) |
| OTL |
Outline
font description (Z-Soft Type Foundry) |
| OTL |
Template
file (Super NoteTab) (Fookes) |
| OTL |
Template
file (PrintMaster Gold) |
| OTX |
Text
file (Olivetti Olitext Plus) |
| OUT |
Output
file (Microsoft C) |
| OV |
Database
file (Revelation-DOS) |
| OV1 |
Overlay
file |
| OV2 |
Overlay
file |
| OVD |
Datafile
(ObjectVision) |
| OVL |
Overlay
file |
| OVR |
Overlay
file |
| O$$ |
Outfile
(Sprint) |
