| S/NO | Abbr. | Meaning |
| 1 | AASI | American Association of Snowboard Instructors (affliated with Professional Ski Instructors of America) |
| 2 | AASI | Abel Assessment for Sexual Interest |
| 3 | AASI | Astronomical Association of Southern Illinois |
| 4 | AASI | Advanced Aerodynamics and Structures, Inc. (aircraft manufacturer; Long Beach, CA) |
| 5 | AASI | Ambulatory Arterial Stiffness Index (blood pressure) |
| 6 | AASI | Associate of the Ambulance Service Institute (UK) |
| 7 | AASI | Automobile Association of South India |
| 8 | AASI | Adopt-a-School Initiative (Wake County Public School System; North Carolina) |