HSAA
| Acronym | Definition |
|---|---|
| HSAA | High School Athletic Association (Plano, TX) |
| HSAA | Handbook of Space Astronomy and Astrophysics (Cambridge University Press) |
| HSAA | Health Sciences Association of Alberta (Canada) |
| HSAA | Hospital Service Accountability Agreement (Canada) |
| HSAA | Henry Schein Ash Arcona (Canada) |
| HSAA | High School Alumni Association |
| HSAA | Homeland Security Appropriations Act of 2004 (US DHS and Executive Office of the President) |