| ASTRO | Advanced Short Term Research Opportunity 
| Others |
| ASTRO | Advisor Strategy and Tax Return Optimization
| Others |
| ASTRO | Alarms Submarine Tsunami Relief Operation
| Others |
| ASTRO | Alternative Science Technology Research Organisation
| Others |
| ASTRO | American Society for Therapeutic Radiology and Oncology
| Others |
| ASTRO | Army Space Technology and Research Office
| Others |
| ASTRO | Asashio Sogo Teachers ROom or
| Others |
| ASTRO | Autonomous Space Transport Robotic Operation
| Others |
| ASTRO | Autonomous Space Transport Robotic Operations
| Others |