| Rank | Abbreviation | Meaning |
|---|
| ***** | AISO | All India Students Organisation
| |
| ***** | AISO | Associazione Italiana Studio Osteosintesi
| |
| ***** | AISO | Associazione Interprofessionale Semi Oleosi
| |
| ***** | AISO | acute idiopathic scrotal oedema
| |
| ***** | AISO | Affordable Internet Services Online, Inc.
| |
| ***** | AISO | Affordable Internet Solutions
| |
| **** | AISO | Associazione Italiana Studenti di Odontoiatria
| |
| **** | AISO | Alberta Independent System Operator
| |
| **** | AISO | American Indian Student Organization
| |
| **** | AISO | Address Information System Office
| |
| **** | AISO | Agency Information Security Officer
| |
| **** | AISO | Automated Information Security Officer
| |
| **** | AISO | Arab Internet Standards Organisation
| |
| **** | AISO | Associação Ibero-Americana de Sociologia das Organizações
| |
| *** | AISO | Australian International Student Office
| |
| *** | AISO | Assistant Information Systems Officer
| |
| *** | AISO | Administrative Information Systems Office
| |
| *** | AISO | Advanced Intelligence Solutions Operation
| |
| *** | AISO | Australian Intelligence Security Organisation
| |
| *** | AISO | Automated Information Security Official
| |
| ** | AISO | Associazione Italiana Studenti Odontoiatria
| |
| ** | AISO | Academic Infrastructure Support Organization
| |
| ** | AISO | Associazione Italiana Societa' diOutplacement
| |
| ** | AISO | Association of Inland Shipping Operators
| |
| ** | AISO | African Internationalist Student Organization
| |