Formulas
- Cross section (physics)
- Crossing number (graph theory)
- Crossing number inequality
- Crown graph
- Cryptanalysis of the Lorenz cipher
- Cryptographic hash function
- Cryptographically secure pseudorandom number generator
- Analysis of algorithms
- Analysis of variance
- Analytical mechanics
- Mass concentration (chemistry)
- Mass in special relativity
- Mass matrix
- Mass–energy equivalence
- Master theorem (analysis of algorithms)