| Acronym | Definition |
|---|
| AASO | Associazione Archivio Storico Olivetti (Italian: Olivetti Historical Association Archive) |
| AASO | Akademia Alternatywnych Systemow Operacyjnych (Polish) |
| AASO | African-American Student Organization |
| AASO | Ann Arbor Symphony Orchestra (Michigan) |
| AASO | Albanian American Student Organization |
| AASO | Airborne Atmospheric Science Office |
| AASO | Association of American Ship Owners |
| AASO | Aboriginal AIDS Service Organizations |
| AASO | Advanced Audio Server Override (package) |
| AASO | AmerAsian School in Okinawa |
| AASO | Army Air Supply Organisation |
| AASO | Army Aeronautical Service Office |
| AASO | Analytical Abstraction Stage Operator |
| AASO | Agency Accounting Systems Office |
| AASO | Assistant Area Staff Officer |
| AASO | Annual of the American School of Oriental Research (Cambridge, MA) |
| AASO | Amateur Astronomical Space Observatory |
| AASO | Ann Arbor Society for Origami (Michigan) |
| AASO | Amplatzer Atrial Septal Occluder |
| AASO | Afro-Asian Solidarity Organisation (Egypt) |
| AASO | African American Student Overnighter |
| AASO | Arab-American Student Organization |
| AASO | Asian American Student Organization |