Fatigue Syndrome CFSP – (i) Common Foreign and Security Policy CFU – (i) Colony Forming Unit(s) in Microbiology CFV – (i) Cavalry Fighting Vehicle CFZ – (i) Critical Friendly Zone CG CG – (i) Client Group – Computer Graphics – Controls Group – (s) Democratic Republic of the Congo (FIPS 10-4 country code) – Republic of the Congo (ISO 3166 digram) CGDC – (i) Computer Game Developers Conference (became GDC in 1998) CGF – (i) Computer-Generated Forces (Simulation) CGH – (i) Comparative Genomic Hybridisation CGIG – (i) Cross-Government Implementation Group CGM – (i) Computer Graphics Metafile CGO – (s) Republic of the Congo (IOC and FIFA trigram, but not ISO 3166) CGS – (i) Chief of the General Staff CGSI – Consumer Guidance Society of India CGT – (i) Capital Gains Tax CH ch – (s) Chamorro language (ISO 639-1 code) ch – ch(L) is used to denote the Chern character of a line bundle CH (p) Chieftain tank (s) China (FIPS 10-4 country code) Switzerland (ISO 3166 digram; from Latin Confoederatio Helvetica) cha – (s) Chamorro language (ISO 639-2 code) CHAMPUS – (a) (U.S.) Civilian Health and Medical Program of the Uniformed Services (now known as TRICARE) CHAOS – (a) Cambridge Heart Anti-Oxidant Study CHAPS – (a) Clearing House Automated Payment System CHDK – (i) Canon Hack Development Kit (Canon camera firmware hack) che – (s) Chechen language (ISO 639-2 code) CHE – (s) Switzerland (ISO 3166 trigram; from Latin Confoederatio Helvetica) CHF – (s) Swiss franc (ISO 4217 currency code) CHI Catholic Health Initiatives (US hospital network) (s) Chile (IOC and FIFA trigram, but not ISO 3166) (i) Columbia Helicopters, Inc Computer-Human Interaction CHiP – (a) California Highway Patrol CHIPS – (a) Cosmic Hot Interstellar Plasma Spectrometer CHL – (s) Chile (ISO 3166 trigram) CHLA – (a) Core Historical Literature of Agriculture CHN – (s) China (ISO 3166 trigram) CHOGM – (a) Commonwealth Heads of Government Meeting CHP (i) California Highway Patrol Combined Heat and Power CHPSO – (a) California Hospital Patient Safety Organization CHRS – Canadian Heart Rhythm Society CHS – (i) Combat Health Support CHT – (i) Certified Hand Therapist chu – (s) Old Church Slavonic language (ISO 639-2 code) chv – (s) Chuvash language (ISO 639-2 code) CREN – (p) Christian Real Estate Network Real Estate Association CI Ci – (s) Curie CI (s) Chile (FIPS 10-4 country code) Côte d'Ivoire (ISO 3166 digram) (i)