| Abbreviation | Definition |
|---|---|
| OGT | Oberthur Gaming Technologies |
| OGT | One Good Tern gift shop |
| OGT | Organismos Geneticamente Transformados |
| OGT | Oso Grande Technologies, Inc. |
| OGT | Oxford Gene Technology |
| OGUK | Oil and Gas UK Ltd |
| OGV | Odyssey Group Video |
| OGW | Olympic Greasy Watermelon |
| OGW | Our Gang Welding |
| OGZ | Ocariz, Gitlin, Zomerfeld, LLP |
| OHD | Order Home Delivery |
| OHD | OverHead Door Company of Charlotte |
| OHEAC | O'Gara- Hess & Eisenhardt Armoring Company |
| OHF | Oak Haven Farms |
| OHFL | Oak Harbor Freight Lines, Inc. |
| OHG | Official Hotel Guide |
| OHI | Observatory Hill, Incorporated |
| OHI | Oman Holdings International |
| OHL | Ozburn-Hessey Logistics |
| OHMS | On Hold Marketing Systems |