Similar to 心臓超音波検査
 - CADComputer-aided design
 - CAEComputer-aided engineering
 - Call Level InterfaceCall Level Interface
 - Capability-based securityCapability-based security
 - CAPEレシオCyclically adjusted price-to-earnings ratio
 - Carrier CorpsCarrier Corps
 - CASBEECASBEE
 - CASL
 - CDix
 - CF-18 ホーネットMcDonnell Douglas CF-18 Hornet
 - CFL条件Courant–Friedrichs–Lewy condition
 - CH-53 (航空機)Sikorsky CH-53 Sea Stallion
 - ChapelChapel (programming language)
 - CherryPyCherryPy
 - CHOP療法CHOP (chemotherapy)
 - CIS 40 GLSTK 40 GL
 - Cisco Internetworking Operating SystemCisco IOS
 - MediaWiki:Citethispage-content
 - CL-154級軽巡洋艦CL-154-class cruiser
 - CLIPSCLIPS
 - CLUCLU (programming language)
 - CMP FATCMP FAT
 - CMPトラックCanadian Military Pattern truck
 - CODASYLCODASYL
 - Code ReadingCode Reading
 - Common LispCommon Lisp
 - Common Object Request Broker ArchitectureCommon Object Request Broker Architecture
 - Common Warehouse MetamodelCommon warehouse metamodel