| Abbreviation | Definition |
|---|---|
| CIDMA | Center for Research & Development in Mathematics and Applications |
| CIE | Confidence Interval Estimate |
| CIE | Critical Initialization Error |
| CIIM | Center for Industrial and Interdisciplinary Mathematics |
| CIMC | Canadian Intermediate Mathematics Contest |
| CIMM | Cognitive Instruction in Mathematical Modeling |
| CIMT | Centre for Innovation in Mathematics Teaching |
| CIRC | Cross-Interleaved Reed-Solomon Code |
| CIRF | Curve Indicator Random Field |
| CISA | Computational Intelligence and Signal Analysis |
| CJM | Canadian Journal of Mathematics |
| CJML | Chicago Junior Mathematics League |
| CL | Centre Line |
| CL | Confidence Level |
| CL | Confidence Limit |
| CL | Cut Level |
| CLAD | Censored Least Absolute Deviation |
| CLE | Constraint List Element |
| CLF | Control Lyapunov Function |
| CLP | Constant Liner Performance |