| Acronym | Definition |
|---|
| CASO➣Communauté d'Agglomération de Saint-Omer (French: Agglomeration Community of Saint-Omer; Saint-Omer, France) |
| CASO➣Central Aichi Symphony Orchestra (Japan) |
| CASO➣Computer Animation Studios of Ontario (Toronto, Ontario, Canada) |
| CASO➣Central Administration Server Option (server management program) |
| CASO➣Canada Southern Railway Company |
| CASO➣Cancellation Addendum Sales Order (NASA) |
| CASO➣Chief Aviation Security Officer (various locations) |
| CASO➣Computer Resources Acquisition Support Office |
| CASO➣Centre d'Accueil, d'Orientation et de Soins (French: Welcome, Care and Guidance Center; Doctors of the World) |