| Academic Requirement Tracking System | Academic & Science |
| Atmospheric Radiative Transfer Simulator | Academic & Science |
| Addiction Research and Treatment Services | Academic & Science |
| Atlanta Reprographics and Typesetting Services | Business |
| Association for Retail Technology Standards | Business |
| Asphalt Rubber Technology Service | Business |
| Austin Revitalizing The Shores | Community |
| At Risk Talented Students | Community |
| Arts Restoration Throughout Schools | Community |
| Arts Recognition and Talent Search | Community |
| Artists Rendering Their Services | Community |
| Artscene Radio Talk Show | Community |
| Symposium on Small Computers in the ARTS | Community |
| Analog Real-time Synthesizer | Computer Hardware |
| Action Real Time Strategy | Computing |
| Association of Retail Technology Standards | Computing |
| American Radio Telephone System | Computing |
| Automatic Range Transponder System | Electronics |
| Advocacy, Research, Training and Services | General |
| A Reason to Survive | General |
| Acquisition Requirements Tracking System | General |
| Alpha Repertory Television Service | General |
| Area Rapid Transit System | General |
| Alignment Reference Transfer System | General |
| Action Review Tracking System | General |
| Automation Result Triage System | General |
| Adaptive Restraint Technology System | General |
| American Race Truck Series | General |
| Advanced Road Traffic Systems | General |
| Automated Radar Terminal System | Governmental |
| Advanced Rural Transportation Systems | Governmental |
| Activities Reservations Tracking System | Governmental |
| Advanced Rural Transportation System | Governmental |
| Arrmy Training Study | Military and Defence |
| All Range Tactical Squadron | Military and Defence |
| Automated Resource Tracking System | Space Science |
