# CS

CS, C-S, C.S., Cs, cs, or cs. may refer to:

## Job titles

* Chief Secretary (Hong Kong)
* Chief superintendent, a rank in the British and several other police forces
* Company secretary, a senior position in a private sector company or public sector organisation
* Culinary Specialist, a US Navy occupational rating

## Language

* Czech language (ISO 639-1 language code)
* Hungarian cs, a digraph in the Hungarian alphabet

## Organizations

* Christian Social Party (Austria), a major conservative political party in the Cisleithania, part of Austria-Hungary, and in the First Republic of Austria
* Citizens (Spanish political party), a post-nationalist political party in Spain
* Congregation of the Missionaries of St. Charles, a Catholic religious congregation, also called Scalabrinians
* Confederate States of America, an unrecognized confederation of secessionist North American slave states existing from 1861 to 1865

### Companies

* Colorado & Southern Railway, a railroad company in the western United States
* Comlux Aruba NV (IATA airline code: CS)
* Connecting Stockholm, future train operator in Sweden
* Copenhagen Suborbitals, a Danish non-profit rocket group working on the HEAT1X-TYCHO BRAHE rocket
* CouchSurfing, a hospitality service
* Credit Suisse, a Swiss financial services company
* Comp-Sultants, a defunct microcomputer company
* CS Wind, a South Korea-based manufacturer of wind turbine towers

## Places

* Cannon Street station, London, UK, abbreviated CS in UK railway slang
* Czechoslovakia (former ISO 3166-1 country code)
* Serbia and Montenegro (former ISO 3166-1 country code)
* Circuito Sur, national highway of Cuba

## Science and technology
### Biology and medicine

* Caesarean section, a surgical procedure to deliver one or more babies, or, rarely, to remove a dead fetus
* Cardiogenic shock, a medical emergency where heart fails to pump properly to push blood forward.
* Carotid sinus, a dilated area at the base of the internal carotid artery.
* Cockayne syndrome, a rare autosomal recessive, congenital disorder
* Conditioned stimulus, in the psychological procedure of classical conditioning
* Corticosteroids, a class of hormones produced in vertebrates, and their synthetic analogues
* Cowden syndrome, a rare autosomal dominant inherited disorder
* (-)-camphene synthase, an enzyme
* CS (gene), which encodes the enzyme citrate synthase

### Chemistry

* Caesium or Cesium, symbol Cs, a chemical symbol
* Carbon monosulfide, chemical formula CS

### Computing

* Computer science, the scientific and practical approach to computation and its applications
* CS register, or code segment register, in X86 computer architecture
* Cable select, an ATA device setting for automatic master/slave configuration
* Checkstyle, a Java static code analysis tool
* Chip select, a control line in digital electronics
* ChanServ, an IRC network service
* Construction Set, a program for creating or editing PC games (i.e. The Elder Scrolls Construction Set)
* Adobe Creative Suite, a design and development software suite by Adobe Systems
* C#, a general-purpose, multi-paradigm programming language.

### Mathematics

* cs (elliptic function), one of Jacobi's elliptic functions

### Other uses in science and technology

* Carbon steel
* Cirrostratus cloud
* Citizen science
* Compressed sensing, a signal processing technique for reconstructing a signal using underdetermined linear systems
* Control segment, part of the structure of the Global Positioning System
* Counter-scanning, a scanning method that allows correcting raster distortions
* cS, another form for cSt, for centistokes, a unit of viscosity

## Law enforcement

* CS gas, a riot control agent

## Other uses

* Controlled substance, generally a drug or chemical whose manufacture, possession, or use is regulated by a government
* Cable Ship, in civilian ship names
* Calgary Stampede, a rodeo
* Caught stealing, a statistic in baseball
* Chhatrapati Shivaji, c. 1627/1630 – 1680), Indian warrior king and member of the Bhonsle Maratha clan
* Christian Science, a religion
* Cities: Skylines, 2015 city-building simulation video game
* Coke Studio (disambiguation), several musical television shows
* Counter-Strike, a series of video game first released as a 1999 modification for Half-Life
* Cum Suis (Latin: "and associates"); see List of Latin phrases
* Customer service, the provision of service to customers before, during and after a purchase and sale
* Bombardier-Airbus C-Series, small jetliner
* Ferrari 360 Challenge Stradale
* A US Navy hull classification symbol: Scout cruiser (CS)
* Post-nominal letters for the Missionaries of St. Charles Borromeo (Scalabrinians), a Catholic religious congregation