Sis

Intelligence

• SIS 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,
• 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 Investigations Section, a section of the Los Angeles Police Department
• Signals Intelligence Section, involved with the Magic project during World War II

Businesses

• SIS International Research, a global market research firm headquartered in New York City
• Silicon Integrated Systems, an electronics manufacturing company
• Satellite 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

Schools

• SIS Swiss International School, a group of 15 private day schools in Switzerland, Germany and Brazil

Canada

• SIS McGill University School of Information Studies

China

• SIS Shekou International School, in Shekou
• Singapore International School, in Hong Kong
• South Island School, in Hong Kong

Germany

• School of International Studies of the Dresden University of Technology

India

• Singapore International School Mumbai

Indonesia

• Surabaya International School

South Korea

• Seoul International School

Sweden

• Stockholm International School

United Arab Emirates

• Sharjah Indian School

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 organizations

• SIS Sisters in Islam, an organization based in Malaysia
• SIS Swedish Standards Institute, formerly Standardiseringskommissionen i Sverige
• SIS Specialized Information Services, a division of the United States National Library of Medicine

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

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

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

Other acronyms

• SIS (band), Korean band founded 2017
• SiS (TV series), a morning talk show
• Supervised injection site