| ACR
| Antarctic Climate Research
|
| ADOS
| African Doppler Survey
|
| AE
| Auroral Electrojet
|
| AIEA
| Agence Internationale de l'Energie Atomique
|
| AIGA
| Association Internationale de Géomagnétisme et d'Aéronomie
|
| AIH
| Association Internationale des Hydrogéologues
|
| AISH
| Association Internationale des Sciences Hydrologiques
|
| AISPIT
| Association Internationale de Sismologie et de Physique de l'Intérieur de la Terre
|
| AISPO
| Association Internationale des Sciences Physiques de l'Océan
|
| AIVCIT
| Association Internationale de Volcanologie et de Chimie de l'Intérieur de la Terre
|
| AMA
| Antarctic Middle Atmosphere
|
| ASRO
| Abbreviated Seismic Research Observatory
|
| ASSA
| Austrian Solar and Space Agency
|
| AWRA
| American Water Research Association
|
| AWS
| Automatic Weather Stations
|
| BGI
| Bibliographie Géodésique Internationale
|
| BGI
| Bureau Gravimétrique International
|
| BHI
| Bureau Hydrologique International
|
| BIH
| Bureau International de l'Heure
|
| BIPM
| Bureau International des Poids et Mesures
|
| BIRP
| British Institutions Reflection Profiling
|
| BRGM
| Bureau de Recherches Géologiques et Minières (France)
|
| CAS
| Commission on Atmospheric Sciences
|
| CCCO
| Committee on Climate Changes and the Ocean
|
| CCF
| ICSU Climate Coordinating Forum
|
| CERESIS
| Centro Regional de Sismologia para America del Sur
|
| CFC
| Chloro-Fluoro-Carbons
|
| CIRA
| COSPAR International Reference Atmosphere
|
| CIRES
| Cooperative Institute of Research in Environmental Sciences
|
| CIUS
| Conseil International des Unions Scientifiques
|
| CMG
| Commission for Marine Geology
|
| CNES
| Centre National d'Etudes Spatiales (France)
|
| CNRS
| Centre National de la Recherche Scientifique (France)
|
| COBOL
| Coastal Boundary Layer
|
| COCORP
| Consortium for Continental Reflection Profiling
|
| CODATA
| Committee on Data for Science and Technology
|
| COI
| Commission Océanographique Intergouvernementale
|
| COSPAR
| Committee on Space Research
|
| COSTED
| Committee on Science and Technology in Developing Countries
|
| COTES
| Conventional Terrestrial Reference System
|
| COWAR
| Committee on Water Research
|
| CRT
| Cathode Ray Tube
|
| CSAV
| Ceskoslovensk Akademie Vëd (Czechoslovak Academy of Sciences)
|
| CSS
| Center for Seismic Studies
|
| CTD
| Conductivity Temperature Depth
|
