CIS

CIS may refer to:

Computing

 * Card information structure, formatting and organization data stored on a PC card
 * Center for Internet Security, cybersecurity benchmarks, controls, practices and tools
 * Center for Internet and Society (disambiguation)
 * Comodo Internet Security suite
 * CompuServe Information Service, a US commercial online service
 * Computer information systems, technologies which process data to solve business problems
 * Configuration interaction singles, a quantum-chemical method for computing electronic states
 * Contact image sensor, a technology developed for optical flatbed scanners
 * Continuous ink system, for ink-jet printers

Education

 * Calcutta International School, in India
 * Canadian International School (disambiguation)
 * Canadian International School (Bangalore)
 * Canadian International School Vietnam
 * Canadian International School of Sanya, in China
 * Canadian International School (Singapore)
 * Canadian International School (Tokyo)
 * Cayman International School in Grand Cayman, Cayman Islands
 * Cebu International School, in the Philippines
 * Chinese International School, in Hong Kong
 * Clifford International School, in Guangzhou, Guangdong, China
 * College in the Schools, a program for high school students run by the University of Minnesota, U.S.
 * Colombo International School, in Sri Lanka
 * Communities In Schools, a U.S. federation of organizations combating educational dropout
 * Copenhagen International School, in Denmark
 * Council of International Schools, an international educational community organizations
 * MIT Center for International Studies, in Massachusetts, U.S.

Health

 * Cancer Information Service, a program of the US National Institutes of Health
 * Carcinoma in situ, group of abnormal cells which may be cancer
 * Clinically isolated syndrome, an initial neurological episode related to nerve tissue
 * Combined intracavernous injection and stimulation test, a diagnostic procedure for erectile dysfunction

United States

 * Center for Immigration Studies, an American anti-immigration think tank
 * United States Citizenship and Immigration Services, a US government agency

British

 * Christians in Science, a UK organization
 * Co-operative Insurance Society, a British insurance company

Canadian

 * Canadian Ice Service, a division of the Meteorological Service of Canada
 * Canadian Identification Society, of police and civilians in crime scene investigation
 * Canadian Interuniversity Sport, a former name of the national governing body of university sport

Eurasian

 * Commonwealth of Independent States, a Eurasian intergovernmental organization
 * CIS national football team, a National association football team

Other

 * Centre for Independent Studies, an Australian libertarian think tank
 * Centro de Investigaciones Sociológicas, a Spanish public research institute
 * CIS Corps (Ireland), Communications and Information Services Corps, Irish combat support corps
 * Cisalpino, Swiss–Italian railway company (CIS in timetables)
 * Commonwealth Police (Commonwealth Investigation Service), an Australian security service, 1945 to 1960

Other uses

 * Canton Island Airport, Kanton Island, Phoenix Islands, Kiribati, IATA code
 * Capital Indoor Stadium, an indoor arena in Beijing, China
 * Case Information Statement, a document used in US civil lawsuits
 * cis (mathematics), a trigonometric mathematical function
 * CIS Tower, a building in Manchester, England
 * Common Intelligibility Scale, for speech intelligibility
 * Community Innovation Survey, a series of surveys throughout the European Union
 * Confederacy of Independent Systems, a fictional entity in the Star Wars universe
 * Continuous Injection System, a fuel injection system developed by the Robert Bosch Group
 * Copper indium selenide (CuInSe2), used in solar cells and semiconductors
 * Corpus Inscriptionum Semiticarum, a corpus of Semitic inscriptions