Cos
# Cos

Cos, COS, CoS, coS or Cos. may refer to:

## Mathematics, science and technology

* Carbonyl sulfide
* Class of service (CoS or COS), a network header field defined by the IEEE 802.1p task group
* Class of service (COS), a parameter in telephone systems
* Cobalt sulfide
* COS cells, cell lines COS-1 and COS-7
* Cosine, a trigonometric function
* Cosmic Origins Spectrograph, a Hubble Space Telescope instrument

## Operating systems

* COS (operating system), a Chinese mobile OS
* Cray Operating System
* Chippewa Operating System, from Control Data Corporation
* Commercial Operating System, from Digital Equipment Corporation
* GEC COS

## Places

* Cos, Ariège, France
* Cos or Kos, a Greek island
* COS, IATA code for Colorado Springs Airport, Colorado, US
   * Colorado Springs, Colorado, a US city, derived from its airport's code
* Gulf of Cos, Aegean Sea
* Villa de Cos, Zacatecas, Mexico
* Cosio Valtellino (Cös), Lombardy, Italy
* COS, UNDP country code of Costa Rica

## Organizations, societies and churches

* Charity Organization Society
* Children's Orchestra Society, New York City, US
* Church of Satan, a religious organization
* Church of Scientology
* Church of Scotland
* Commandement des Opérations Spéciales, coordinating French special forces
* Community of Science, an online database
* Company of Servers, Anglican altar servers
* Cooper Ornithological Society, California, US

## Universities and schools

* College of the Sequoias, California, US
* College of the Siskiyous, California, US

## Other uses

* Childhood onset schizophrenia
* Roman consul, a political office in Ancient Rome
* COS, a British fashion brand
* Cos lettuce
* Martín Perfecto de Cos (1800–1854), Mexican general
* Consequence of Sound (now Consequence), a New York, US online magazine
* Cos (television series), 1976, hosted by Bill Cosby
* Space Operations Command (Italy) (Comando delle Operazioni Spaziali)
