List of abbreviations: C

CAST Chinese Academy of Space Technology (CN)
CB Citizen Band
CCIR Comité Consultatif International des Radiocommunications (ITU)
CCITT Comité Consultatif International de Télégraph et des Télécommunications (ITU)
CCMS Committee on Challenges of Modern Science (NATO)
CCSDS Consultative Committee on Space Data Systems
CDMA Code Division Multiple Access
CE Conformité Européenne (label for conformity to European Directives)
CENELEC European Committee for Electrotechnical Standardization
CEPT Conférence Européene des Postes et des Télécommunications
CERGA Centre d’Etudes et de Recherches Géodynamiques et Astronomiques
CGMS Coordination on Geostationary Meteorological Satellites
C/I Carrier-to-intermodulation products
CICG Centre International des Conférences Genève
CIE Commission Internationale d’Eclairage
CIMO Commission on Instruments and Methods of Observations (WMO)
CIRM Committee International Radio Maritime
CISPR International Special Commitee on Radio Interference
CITEL Inter-American Conference on Telecommunications
(Conferencia Interamericana de Telecommunicaciones)
CMTT Joint Study Group for Television and Sound Transmission
CNES Centre National d’Etudes Spatiales (F)
CNET Centre National d’Etudes des Télécommunications (F)
CNIE Comision Nacional de Investigaciones Espaciales
CNR Carrier-to-noise ratio
CNRS Centre National de Recherches Scientifiques (F)
CODATA Committee on Data for Science and Technology
COFDM Coded Orthogonal Frequency Division Multiplex
COMSAT Communications Satellite Corporation (USA)
COPUOS UN Commission on the Peaceful Use of Outer Space
CORF Commission on Radio Frequencies (NRC-USA)
COSPAR Committee on Space Research
COSPAS Russian system of Satellite Search and Rescue
COSTED Committee on Science and Technology in Developing Countries
CPE Customers premises equipment
CPEM Conference on Precision Electromagnetic Measurements
CPG Conference Preparatory Group (CEPT)
CPM Conference Preparatory Meeting (ITU)
CRAF Committee on Radio Astronomical Frequencies (ESF)
CSA Canadian Space Agency (CDN)
CSIRO Commonwealth Scientific and Industrial Research Organization
CSTG Commission for International Coordination of Space Techniques for Geodesy and Geodynamics
CT Cordless Telephone
CTO Commonwealth Telecommunications Organisation
CTR Common Technical Regulation (ETSI)
CW Continuous Wave