| OTG | Obey The Gospel 
| Others |
| OTG | Oblivious To Greatness
| Others |
| OTG | Odense Tekniske Gymnasium
| Others |
| OTG | Off The Grid
| Others |
| OTG | Off The Ground
| Others |
| OTG | Off to Gaming
| Others |
| OTG | Offices To Go
| Others |
| OTG | Old Timers Guild
| Others |
| OTG | Oldtimer Garage
| Others |
| OTG | Olive Tree Genealogy
| Others |
| OTG | On The Go
| Others |
| OTG | On The Grind
| Others |
| OTG | On the Ground
| Others |
| OTG | On-The-Go
| Others |
| OTG | One Team Global
| Others |
| OTG | Only the Gut
| Others |
| OTG | Open Terrain Generator
| Others |
| OTG | Operational Target Graphic
| Others |
| OTG | Operational Task Group
| Others |
| OTG | Optimal Training Gym
| Others |
| OTG | Oracle Trading Guild
| Others |
| OTG | Oracle Transparent Gateway
| Others |
| OTG | Ostfriesische Tee Gesellschaft
| Others |
| OTG | Out The Gate
| Others |
| OTG | Outside Temperature Gauge
| Others |
| OTG | Outside The Gym
| Others |
| OTG | Oven Toaster and Griller
| Others |
| OTG | Oven Toaster Grill
| Others |
| OTG | Oven, Toaster and Griller
| Others |
| OTG | Over The Glass
| Others |
| OTG | Over The Glasses
| Others |
| OTG | Over The Glasses ski goggles
| Others |
| OTG | Over The Gun
| Others |
| OTG | Worthington Airport
| Others |
| OTG | Worthington, Minnesota USA
| Others |