| Advanced Technologies in Electrical and Communications | Academic & Science |
| Applied Technology and Engineering Center | Academic & Science |
| Advanced Turbine Engine Company | Business |
| A T E C Group, Inc. | Business |
| Advanced Test Equipment Corporation | Business |
| Art and Technology | Business |
| Alpine Transition and Education Center | Community |
| Advanced Technologies Education Center | Community |
| Algae Technology Educational Consortium | Community |
| The Alberta Tourism Education Council | Community |
| Advanced Technical and Educational Consultants | Community |
| Australian Tourism Export Council | Community |
| Assistive Technology Exchange Center | Computing |
| Arts Technology and Emerging Communication | Computing |
| Arts Technology and Emerging Communications | Computing |
| Assistive Technology Exhibition and Conference | Computing |
| Assistive Technology Center | Computing |
| Applied Technology Education Center | Computing |
| Authorized Technical Education Center | Computing |
| Advance Technology Education Centre | Computing |
| Applied Technology Education Campus | Computing |
| Automotive Testing Expo China | General |
| Aviation Technician Education Council | General |
| Automated Tissue Excision And Collection | General |
| Automatic Tissue Extraction and Collection | General |
| Army Test Evaluation Command | Governmental |
| Annual Total Energy Consumption | Governmental |
| Automated Test Control | Governmental |
| Army Test and Evaluation Command | Governmental |
| Advanced Transportation Energy Center | Governmental |
| Autism Treatment Evaluation Checklist | Medical |
| Autism Treatment Evaulation Checklist | Medical |
| Athletic Training Educators Conference | Sports |
