OGM-Ogg-Media-video-file
OGNC-Dynamic-Web-Page
OGNC-Web-Page-Source-Code
OGO-Origin-graphic-object-file
OGR-OGR-C-open-source-library
OGS-Origin-File
OGS-Origin-script-file
OGV-Ogg-Vorbis-Video-File
OGV-Ogg-Vorbis-Video-Header
OGV-Ogg-Vorbis-video-profile
OGW-Origin-Worksheet-File-OriginLab-Corporation
OGX-C-Component-Gallery-Exported-Classes-and-Resources-Borland-Software-Corporation
OGX-Ogg-Vorbis-Multiplexed-Media-File
OGX-Ogg-Vorbis-Multiplex-Profile-Xiph-Org-Foundation
OH4-Overhoor-DrillAssistant-List-Efkasoft
OHB-Source-On-Hand-Basic
OHC-OpenHelp-Table-of-Contents-File-Borland-Software-Corporation
OH-DrillAssistant-list-file
OHI-Openhelp-file
OHL-OpenHelp-Link-Borland-Software-Corporation
OH-Overhoor-DrillAssistant-List-Efkasoft
OHP-DOS-7-File
OHP-Dos7-file
OHP-OpenHelp-project-file
OHS-Bink-Outbound-History
OHSD-HealthFrame-OpenHealth-Service-Plug-in-Records-For-Living-Inc
OHS-Outbound-History-Bink
OID-Object-Interaction-Diagram-Prosa-OM
OID-ProCurve-Manager-Non-ProCurve-Network-Device-File
OIF-QuickBase-file-format
OIF-QuickBase-Web-sharable-Database-Interchange-File
OIK-Lenn-3D-Plant-Distribution-File-Lenn-3D-GmbH-i-G
OIL-Open-Image-Library-Format
OIL-Open-Image-Library-Format-image-format
OIT-SleepScan-and-Ceegraph-Offset-Index-File-Bio-logic-Systems-Corp
OIX-Lenn-3D-Plant-Distribution-File-Lenn-3D-GmbH-i-G
OJ-Atari-Jaguar-DSP-JERRY-object-module-file
OJP-3WayPack-file
OJP-3WayPack-The-Three-Mode-Company
OK-Dot-OK-File-Digest-John-Oberschelp
OK-QEDIT-file
OKR-Feldeinteilung-module-file-3-D-Fassade-Plus
OKS-OKScript-File-Mike-Mardesich
OKT-Music-module-MOD-Oktalyzer
OK-Unknown-Apple-II-File
OKX-OKScript-File-Mike-Mardesich
OLA-Online-Access-File
OLB-Object-Library-OLE-Microsoft
OLB-Object-library-VAX
OLD-Backup-file-Generic
TechTarget file types