| Acronym | Definition |
|---|
| OSIG➣Online Special Interest Group |
| OSIG➣Offshore Site Investigation and Geotechnics (various locations) |
| OSIG➣Online Special Interest Group (various organizations) |
| OSIG➣Outdoor Special Interest Group (Japan) |
| OSIG➣Oklahoma School Insurance Group |
| OSIG➣Oregon State Investment Group (Oregon State University) |
| OSIG➣Open Source Implementation Group |