| Acronym | Definition |
|---|
| OSTG➣Open Source Technology Group |
| OSTG➣Open Source Technology Group (formerly Open Source Development Network; OSDN) |
| OSTG➣Offline SNA (Systems Network Architecture) Table Generation |
| OSTG➣Ordo Sacer Templi et Graalis (Spanish: Sacred Order of the Temple and the Grail) |