# CRS

CRS may refer to:

## Organisations
### Government related

* Career Retention Specialist, a Marine responsible for enlisted retention in U.S. Marine Corps units
* China Reconstruction Society, also known as the Blue Shirts Society, a Fascist clique and secret police or para-military force in the Republic of China between 1931 and 1938
* Commission of Railway Safety, rail safety authority in India
* Common Reporting Standard, an OECD standard for exchange of information
* Community Relations Service, United States Department of Justice branch for CR and civil rights
* Compagnies Républicaines de Sécurité, the French riot-control force
* Congressional Research Service, the public-policy arm of the United States Congress

### NGO or commercial

* Catholic Relief Services, an American international humanitarian agency
* Center for Resource Solutions, a nonprofit public agency in the United States
* Classic Rock Society, a UK-based organisation to promote classic and progressive rock music
* Co-operative Retail Services, a former co-operative society in the United Kingdom
* Creation Research Society, a Christian research group which engages in creation science
* Croatian Register of Shipping, an independent classification society working in the marine market
* Somaschi Fathers (Ordo Clericorum Regularium a Somascha), a charitable religious congregation

## Science and technology
### Medicine and biology

* Cambridge Reference Sequence, used in mitochondrial DNA testing
* Caudal regression syndrome, a rare congenital disorder
* Chinese restaurant syndrome, purportedly caused by the flavor enhancer glutamate
* Chronic radiation syndrome, resulting from prolonged exposures to radiation
* Chronic rhinosinusitis
* Congenital rubella syndrome, a disease passed from mother to fetus
* Cutaneous radiation syndrome, a syndrome that results from acute radiation exposure to the skin
* Cytokine release syndrome, in immunology
* Cytoreductive surgery, in cancer treatment

### Computer science and engineering

* Canada Remote Systems, a now-defunct bulletin-board system based in Toronto
* Carrier Routing System, a large-scale core router
* Celestial Reference System(s), see Barycentric and geocentric celestial reference systems
* Cluster Ready Services, components of Oracle Clusterware for database support
* Cold rolled steel
* Commercial Resupply Services, a NASA contract to deliver supplies to space
* Common reference string model, in cryptography
* Computer reservations system (or Central Reservation System), a computerised system used for travel bookings
* Coordinate reference system, used to locate geographical entities

## Other uses

* Camp Rising Sun (New York), an international leadership-program for youth development
* Child Rebel Soldier, a former hip-hop supergroup composed of Kanye West, Lupe Fiasco, and Pharrell
* Classroom response system, an interactive teaching tool using "clicker questions"
* Seychellois Creole (ISO 639-3 language code), a French-based creole language of the Seychelles
* Colorado Revised Statutes, the legal code of Colorado
* Cosmic Ray Subsystem, a spacecraft instrument on the Voyager probe that helped detect the interstellar medium
* Consumer Recreation Services, a fictional company which features in the 1997 film The Game