Sis

Sis or SIS may refer to:

People

 * Michael Sis (born 1960), American Catholic bishop

Places

 * 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

Intelligence

 * 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

Businesses

 * 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

China

 * Shekou International School, in Shekou
 * Singapore International School, in Hong Kong
 * South Island School, in Hong Kong

United States

 * School of International Service, American University, Washington, D.C.
 * Syracuse University School of Information Studies
 * University of Pittsburgh School of Information Sciences

Other schools

 * SIS Swiss International School, a group of 15 private day schools in Switzerland, Germany and Brazil
 * McGill University School of Information Studies, Canada
 * School of International Studies of the Dresden University of Technology, Germany
 * Singapore International School Mumbai, India
 * Surabaya International School, Indonesia
 * Seoul International School, South Korea
 * Stockholm International School, Sweden
 * Sharjah Indian School, United Arab Emirates

Other organizations

 * 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

Information processing

 * 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

Biological sciences

 * Small intestinal submucosa, transplantation tissue
 * Second-impact syndrome, synergy in concussions
 * Sex in space, an area of biological research

Healthcare

 * Saline infusion sonography, a test used to diagnose uterine polyps
 * Shoulder impingement syndrome, tendinitis of the shoulder

Technologies

 * 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

Other uses

 * 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