| ATG | A** To Grass 
| Others |
| ATG | Academic Technology Group
| Others |
| ATG | Accordionists and Teachers Guild
| Others |
| ATG | Achieving the Greatest
| Others |
| ATG | Active Throttle Governor
| Others |
| ATG | Address Translation Gateway
| Others |
| ATG | Adhesive Transfer Gun
| Others |
| ATG | Advance Tape Glider
| Others |
| ATG | Advanced Technologies Group
| Others |
| ATG | Advanced Technology Gloves
| Others |
| ATG | Advanced Technology Group
| Others |
| ATG | Advisory Task Group
| Others |
| ATG | Afloat Training Group
| Others |
| ATG | Afrikaanse TaalGenootskap
| Others |
| ATG | Against The Grain
| Others |
| ATG | Alexander The Great
| Others |
| ATG | Alfred The Great, King of Wessex
| Others |
| ATG | All Terrain Grade
| Others |
| ATG | All Things Good
| Others |
| ATG | All Things Gym
| Others |
| ATG | Alternate Terrain Generation
| Others |
| ATG | Alternative Therapies Group
| Others |
| ATG | American Top Gear
| Others |
| ATG | American Trucking Group
| Others |
| ATG | Amphibious Task Group
| Others |
| ATG | Analogue Transfer Gate
| Others |
| ATG | Antenna Transceiver Group
| Others |
| ATG | Anti thymocyte globulin
| Others |
| ATG | Anti-Tank Gun
| Others |
| ATG | Anti-Terrorist Group
| Others |
| ATG | Anti-Thymocyte Globulin
| Others |
| ATG | Apoorva The Great
| Others |
| ATG | Aquiline Technology Growth
| Others |
| ATG | Art Techno Group
| Others |
| ATG | Art Technology Group
| Others |
| ATG | Art Theater Guild
| Others |
| ATG | Artists Television Group
| Others |
| ATG | Ascend To Greatness
| Others |
| ATG | Assign Trunk Group Cluster
| Others |
| ATG | At The Gates
| Others |
| ATG | At The Guild
| Others |
| ATG | At The Gym
| Others |
| ATG | Aufmarchan Toiletschaften Gerspudszt
| Others |
| ATG | Austausch Getriebe
| Others |
| ATG | Autistic Tongue Group
| Others |
| ATG | Auto Teilet Genossenschaft
| Others |
| ATG | Auto Trader Group
| Others |
| ATG | Auto Truck Group
| Others |
| ATG | Automatic Tank Gauging
| Others |
| ATG | Automatic Test Generation
| Others |
| ATG | Automotive Training Group
| Others |