| Abbreviation | Definition |
|---|---|
| CISM | Certified Information Security Manager |
| CISQ | Consortium for IT Software Quality |
| CISU | Customer Induced Software Updates |
| CIW | Command Interpreter Window |
| CIX | Code Intelligence XML |
| CJ | Complex Java |
| CKF | Compiler Known Function |
| CKM | Customer Knowledge Management |
| CL | Changed Lines |
| CL | Code Level |
| CL | Common LISP |
| CL | Compile and Link |
| CL | Component Library |
| CLAD | Clear Language And Design |
| CLAIRE | Cyber Linguistic Artificial Intelligence Research Engine |
| CLAM | C Library for Audio and Music |
| CLAP | Command Line Application Popper |
| CLAS | Clayton Loan Analysis System |
| CLAS | Clean Linear Algebra Subroutines |
| CLAS | Common LISP Aspect System |