The initials SIS may stand for:

Intelligence & security agencies

• Secret Intelligence Service, UK intelligence agency, also known as MI6;
• Australian Secret Intelligence Service;
• Canadian Security Intelligence Service;
• New Zealand Security Intelligence Service;
• Slovenská informa?ná slu?ba, Slovak Intelligence Service;
• Special Intelligence Service, a secret FBI intelligence agency operating in South America during World War II;
• Schengen Information System, used by European police forces;
• Signals Intelligence Service, the former United States Army codebreaking division;
• Information and Security Service of the Republic of Moldova;
• Serviços de Informações de Segurança, the Portuguese intelligence agency.

Science

• Small intestinal submucosa, a common, non-immunogenic material used in several clinical applications.
• Second-impact syndrome, a rare, deadly condition in which the brain swells as the result of a concussion received before symptoms from another concussion have gone away.
• Styrene-Isoprene-Styrene.

Business

• Sales Information System, provides Sales reports, transaction available also in SAP: Logistics -> Sales and Distribution -> Sales Information System.

Technology

• Safety instrumented system or safety instrumentation system
• Saline Infusion Sonography, an ultrasound test of the uterine cavity. Also referred to as a hysterosonography.
• Satellite Information Services.
• Satellite Interceptor System.
• Schengen Information System.
• Sequential Importance Sampling.
• Selective Inverted Sink, a device that protects crops from frost.
• Single Image Stereogram, another name for a Single Image Random Dot Stereogram.
• Single Instance Store, a system for coalescing identical object instances to save space.
• Strategic information system, an information system to support enterprises' strategy.
• Student Information System.
• Shimano Index Shifting, (as compared to friction shifting).
• Silicon Integrated Systems.
• .SIS (filename), the filename extension for installation package files for the Symbian OS operating system.
• Superconductor-Isolator-Superconductor Mixer for High frequency heterodyne receivers (over 100 GHz).
• Sensoric Infeed System, infeed process in offset presses.
• "Schwerionensynchroton" (Heavy ion synchrotron) at the GSI research facility in Darmstadt, Germany

Organizations

• SIS International Research.
• Schlumberger Information Solutions.
• Sisters in Islam, an organization based in Malaysia

Schools

• School of International Service at American University, Washington, D.C.
• Seoul International School, an international school in Seoul, Korea.
• Surabaya International School, an international school in Surabaya, Indonesia.
• Stockholm International School, an international school in Stockholm, Sweden.
• Swedish Standards Institute, formerly Standardiseringskommissionen i Sverige.
• Singapore International School, an international school in Hong Kong, China.

See also

• Sis

cs:SIS de:SIS fr:SIS (homonymie) ko:SIS it:SIS nl:SIS ja:SIS no:SIS pl:SIS ru:SIS sk:SIS sl:SIS sv:SIS