| Abbreviation | Definition |
|---|---|
| CL | CLass |
| CL | Combat Level |
| CL | Combat Load |
| CL | Contact Line |
| CL | Course Load |
| CL | CSSCS Lightweight Computer Unit |
| CLA | Chinese Liberation Army |
| CLA | Clean, Lubricate, and Adjust |
| CLA | Craft Launch Area (landing craft) |
| CLAMS | Cleared Lane Marking System |
| CLAP | Chemical Laser Analysis Program |
| CLAR | Communications Loading Analysis Report |
| CLASS | Closed Loop Artillery Simulation System |
| CLAW | Closed Launcher Assault Weapon |
| CLAWR | Cold Lake Air Weapons Range |
| CLAWS | Complementary Low Altitude Weapon System |
| CLAWS | Complementary Low Altitude Weapons System |
| CLB | Combat Logistics Battalion |
| CLBRP | Cannon-Launched Beamrider Projectile |
| CLC | Chinese Labour Corps |