Similar to 語義の曖昧性解消
 - ChipCard VW-200
 - Chipmunk BasicChipmunk Basic
 - ChordChord (peer-to-peer)
- ChromebookChromebook
 - ChronyChrony
 - CIP4▲1 trends
 - CleanClean (programming language)
 - ClickOnceClickOnce
- CLIECLIÉ
 - CNS 11643CNS 11643
 - Code ReadingCode Reading
 - Coffee LakeマイクロアーキテクチャCoffee Lake
 - Comet LakeマイクロプロセッサComet Lake
 - Comma-Separated ValuesComma-separated values
- COMMAND.COMCOMMAND.COM
 - Common Management Information ProtocolCommon Management Information Protocol
 - Communication Access Programming Language
 - CompisCompis
 - Compression Attached Memory ModuleCAMM (memory module)
 - CompuServeCompuServe
 - Computer Based TestingElectronic assessment
 - Computer Typesetting System
 - COMPUTEX TAIPEIComputex
 - Conary
 - Concurrency and Coordination RuntimeConcurrency and Coordination Runtime
 - Construction Master
- Continue文Continue (keyword)
 - Cooper LakeマイクロアーキテクチャCooper Lake (microprocessor)