| Acronym | Meaning |
| CATO | Cadet Administration and Training Order (DND Canada) |
| CATO | Catastrophe At Take-Off (i.e., the rocket blew up) |
| CATO | Catoctin Mountain Park (US National Park Service) |
| CATO | Chief Ammunition Technical Officer (UK military) |
| CATO | Civilian Automated Training Office |
| CATO | Combat Arms Training Organization (Army) |
| CATO | Combined Air Terminal Operation (NATO) |
| CATO | Concealed Approach and Takeoff |
| CATO | Contract Air Terminal Operations |