- CAD
- Camera array
- Cancellable biometrics
- Car depot
- Causal-loop diagram
- Certification Authority (CA)
- Certificate Validation Server (CVS)
- Challenge code
- Charging spot
- Chromium-based duplex alloy
- Client Security
- Cloud computing
- Cloud on-ramp
- Cloud storage
- Cluster system
- CMOS annealing
- Co-Learning
- Collaborative filtering
- Combinatorial optimization problem
- Compiler
- Computational photography
- Concentrated power source
- Constraint programming
- Content management system
- Context
- Contrast
- Contrast correction
- Copyright protection technology
- Core loss
- Cosmic ray-induced neutron
- CQL
- CRUD diagram
- Cyber-physical system
