CIS

Last updated August 11, 2025

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 and information science, a field that emphasizes both computing and informatics
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

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

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

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

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

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