| Abbreviation | Definition |
|---|---|
| CAT | Computer-Assisted Training |
| CAT | Continuous Adaptive Terrain |
| CAT | Crisis Action Team |
| CATA | Combined Arms Training Activity (obsolete term) |
| CATAPS | Contingency Theater Air Control System Automation Plan and System |
| CATB | Combat Arms Training Board (now called Army Training Board) |
| CATCC | Carrier Air Traffic Control Center |
| CATCH-24 | Countering Attack Helicopters (study) |
| CATCH-24 | Countering ATtaCk Helicopters 2024 |
| CATD | Command and Tactics Division |
| CATDECAY | Catastrophic Decay |
| CATES | Counter Air Test and Evaluation Test Site |
| CATF | Commander, Amphibious Task Force |
| CATIES | Combined Arms Training Integrated Evaluation System |
| CATIS | Computer-Aided Tactical Information System |
| CATM | Canadian Army Training Memorandum |
| CATM | Captive Air Training Missile |
| CATO | Cadet Administrative Training Orders |
| CATOC | Corps Artillery Tactical Operations Center |
| CATRADA | Combined Arms TRAining Developments Activity |