| Abbreviation | Definition |
|---|---|
| ATHP | Authorized TeamSpeak Host Providers |
| ATIMS | Air Traffic & Information Management System |
| ATMA | Agricultural Technology Management Agency |
| ATMA | AIMS Test for Management Admissions |
| ATMA | Association of Taxation and Management Accountants |
| ATMAC | Air Traffic Management Advisory Committee |
| ATMD | Air Traffic Management Decision |
| ATMD | Air Traffic Management Division |
| ATME | Academy for Technical and Management Excellence |
| ATMM | Air Traffic Management Manual |
| ATMP | Air Tour Management Plan |
| ATMP | Air Tour Management Plans |
| ATMP | Automated Training Management Program |
| ATMS | Advanced Traffic Management System |
| ATOM | Active Threat and Opportunity Management |
| ATOM | Active Threats Opportunity Management |
| ATOM | Administrative Technology Organizational Management |
| ATOMIC | Automated Total Order Management and Inventory Control |
| ATOMS | Air Traffic Operational Management System |
| ATPM | Attractions Theme Parks Management |