| REG | Drug REGistration number
| Others |
| REG | Raising for Effective Giving
| Others |
| REG | Random Event Generator
| Others |
| REG | Random Event Generators
| Others |
| REG | Reality Expansion Groups
| Others |
| REG | Reed Electronics Group
| Others |
| REG | Regal Entertainment Group
| Others |
| REG | Regiment Etrangere Genie
| Others |
| REG | Reginald
| Others |
| REG | Region
| Others |
| REG | REGister
| Others |
| REG | Registration
| Others |
| REG | Registration information or key
| Others |
| REG | Registry File
| Others |
| REG | Regressive Valve
| Others |
| REG | Regular Electronic Giving
| Others |
| REG | Regular Gas
| Others |
| REG | Regulation
| Others |
| REG | REGulator
| Others |
| REG | Regulator Assembly
| Others |
| REG | Renewable Energy Group
| Others |
| REG | Repair Evaluation Guideline
| Others |
| REG. | Regarding
| Others |