| ATTP | Acquired Thrombotic Thrombocytopenic Purpura 
| Others |
| ATTP | Adapting a Transparent Training Program
| Others |
| ATTP | Advanced Track and Trace for Pharmaceuticals
| Others |
| ATTP | Advanced Track Trace for Pharmaceuticals
| Others |
| ATTP | Advanced Trauma Training Program
| Others |
| ATTP | Alliance of Technology Transfer Professionals
| Others |
| ATTP | Allied Team Training for Parkinson
| Others |
| ATTP | and Then There's Physics
| Others |
| ATTP | Appalachian Turkish Trade Project
| Others |
| ATTP | Apprenticeship and Traineeship Training Program
| Others |
| ATTP | Apprenticeship Traineeship Training Programs
| Others |
| ATTP | Army Tactics Techniques and Procedures
| Others |
| ATTP | Army Tactics, Techniques, and Procedures
| Others |
| ATTP | Assertiveness Training for Technical Professionals
| Others |
| ATTP | Assistant To The Principal
| Others |
| ATTP | Assistive Technology Training Program
| Others |
| ATTP | Automated Traffic Ticket Payments
| Others |
| ATTP | Average Time To Perform
| Others |