SAR or Sar may refer to:

Places

* Sar (river), Galicia, Spain * Sar, Bahrain, a residential district * Sar, Iran (disambiguation), several places in Iran * Sar, Tibet, Tibet Autonomous Region of China * Šar Mountains, in southeastern Europe * Syria, Syrian Arab Republic, sometimes abbreviated as SAR

Business and finance

* Parabolic SAR (stop and reverse), a method of technical stock analysis * Saudi riyal, currency code SAR * Stock appreciation right, an employee reward

Computing

* Segmentation and reassembly, in data networks * Service Archive or SAR, a file format related to JAR (file format)#Related formats, JAR * Shift Arithmetically Right (SAR), an x86 instruction listings#Original 8086/8088 instructions, x86 instruction * Storage Aspect Ratio of a digital image * sar (Unix), or system activity report, a Unix/Linux performance report utility

Law enforcement

* Search and rescue * Nationwide Suspicious Activity Reporting Initiative, US * Suspicious activity report, by a financial institution to an authority

Science

Medicine, psychology, and biology

* Scaffold/matrix attachment region or scaffold-attachment region, DNA sequences * Sexual Attitude Reassessment * Specific absorption rate, of RF energy by the human body * SAR supergroup, a clade within eukaryotes * Structure–activity relationship, of biological effect of a molecule * Systemic acquired resistance, of a plant to a pathogen

Science and technology

* Sar (astronomy), 9 years 5 days, a period separating eclipses * SAR 21, Singapore Assault Rifle 21st century * SAR-87 (Sterling SAR-87), 1980s military assault rifle * Sodium adsorption ratio, an irrigation water quality parameter * Spent Acid Regeneration of Sulfuric acid#Industrial cleaning agent, sulfuric acid * Submarine Advanced Reactor program of USS Triton (SSRN-586)#Propulsion, USS ''Triton'' * Successive Approximation Register of a successive-approximation ADC * Synthetic-aperture radar, imaging radar * IPCC Second Assessment Report * Semi-automatic rifle

Organizations

* SAR Academy, yeshiva in Riverdale, New York, US ** SAR High School, the high school of SAR Academy * SAR Records, an American record label * Scholars at Risk, a network supporting academic freedom * School for Advanced Research in anthropology and related fields, Santa Fe, New Mexico, US * Sigma Alpha Rho, a high school fraternity, Philadelphia, Pennsylvania, US * Society for Artistic Research * Sons of the American Revolution, US organisation

Railways

* Saudi Railway Company * Savage Alberta Railway, Alberta, Canada, reporting mark * South Australian Railways, 1854–1978 * South African Railways, now part of Transnet Freight Rail

Military

* Sandfontein Artillery Regiment, an artillery regiment of the South African Army * State Artillery Regiment, an artillery regiment of the South African Army

Other uses

* Sar (surname) * Sar language, a Bongo–Bagirmi language of southern Chad * Sample of Anonymised Records, based on the UK population census * Search and rescue * Special administrative region, territorial entity designation * Student Aid Report, sent to applicants of U.S. federal financial aid for college * Subject access request, in data protection law