CCR

CCR is a three-letter acronym (TLA) that could mean:
* Creedence Clearwater Revival, a rock band.
* Cross Canadian Ragweed, a Red Dirt Country band
* California Code of Regulations [1]
* California College Republicans
* Canonical Commutation Relation
* Catholic Charismatic Renewal [2]
* Center for Cancer Research [3] – at the Massachusetts Institute of Technology
* Center for Climatic Research [4] – at the University of Wisconsin-Madison
* Center for Computational Research [5] – part of the University at Buffalo in New York
* Center for Constitutional Rights
* Center for Consumer Research [6] – at the University of California, Davis
* Central Contractor Registration – U.S. Government supplier database
* Centre for Conflict Resolution [7]
* Centre for Cultural Research [8] – at the University of Western Sydney
* Ceppad Cammice & Rapid Instruments [9]
* China Chemical Reporter [10]
* Cirencester station – see UK railway stations - C
* Citizens for a Canadian Republic
* Closed Circuit Rebreather [11] – scuba diving gear
* Comissão de Cidadania e Reprodução [12]
* Commitment Concurrency and Recovery (OSI model)
* Competitive Climbing Rank [13]
* The Computer Communication Review [14], a refereed journal from SIGCOMM
* Concord/Buchanan Field Airport (Three-letter IATA airport code)
* Condition Code Register
* Conditional critical region
* Continuity of Care Record
* Coriell Cell Repositories [15] – part of the Coriell Institute for Medical Research
* Corinth and Counce Railroad
* Council for Chemical Research [16]
* Covenants, conditions, and restrictions
* Curtea Constituţională a României [17]
* La Commission Centrale pour la Navigation du Rhin [18]

See also: Koenigsegg CCR