sis

Sis or SIS may refer to:

People

Sis (ancient city), historical town in modern-day Turkey, served as the capital of the Armenian Kingdom of Cilicia.
Kozan, Adana, the current name of the Armenian town of Sis in Cilicia, Turkey
Sis, Armenia, a village in Armenia
Sis, Azerbaijan, a village in the Republic of Azerbaijan
Sis, Iran, a city in East Azerbaijan, Iran
Sis, Kurdistan, a village in Kurdistan, Iran
Sis Rural District (Shabestar County), East Azerbaijan province, Iran
Sis Rural District (Dehgolan County), Kurdistan province, Iran
Mountains of Sis, a range of the Pre-Pyrenees

Schengen Information System, in Europe
Security Information Service, Czech domestic information intelligence agency known as BIS
Secret Intelligence Service, UK intelligence agency, also known as MI6
Australian Secret Intelligence Service, Australia’s national intelligence service
Canadian Security Intelligence Service, Canada's national intelligence service
New Zealand Security Intelligence Service, an intelligence agency of the New Zealand government
Finnish Security Intelligence Service, the intelligence agency of Finland in charge of national security
Slovenská informačná služba, Slovak Intelligence Service
Special Intelligence Service, a secret FBI intelligence agency operating in South America during World War II
Signals Intelligence Service, the former United States Army codebreaking division
Information and Security Service of the Republic of Moldova, the principal intelligence agency of Moldova.
Serviço de Informações de Segurança, a Portuguese intelligence agency
Survey of India Service, formerly the Great Trigonometric Survey
Special Investigation Section, a tactical detective and surveillance unit of the Los Angeles Police Department
Signals Intelligence Section, involved with the Magic project during World War II

Silicon Integrated Systems, an electronics manufacturing company
Sports Information Services, a news service company
Siemens IT Solutions and Services, a service provider which is part of Siemens AG headquarters
SIS (motorbikes), a Portuguese manufacturer of motorcycles

Sisters in Islam, an organization based in Malaysia
Swedish Institute for Standards
Specialized Information Services, a division of the United States National Library of Medicine
State Information Service, official media and public relations apparatus of the Egyptian state

SIS (file format), Symbian OS filename extension
Short integer solution problem, a problem in lattice-based cryptography
Single-instance storage, information-storage space-saving mechanism
Strategic information system, a part of corporate strategy
Student information system, a software application for education establishments to manage student data
Sequential Importance Sampling

Selective inverted sink, frost protection device
Safety instrumented system or safety instrumentation system
Space Infrastructure Servicing, a robotic spacecraft for in-space refueling of communication satellites
Sequential infiltration synthesis, a method to infiltrate polymers to create inorganic-organic hybrid materials

SIS (group), South Korean girl group founded 2017
SiS (TV series), a morning talk show
SIS, a 2008 television film directed by John Herzfeld
Supervised injection site
{{MS|Sis||}}, car ferry
Singular isothermal sphere profile, a simple density distribution used in astronomy
Silicon monosulfide, chemical formula SiS
SIS (Soft Is Strong), 2024 EP by Katseye