SAR
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
 - Sark, a Channel Island, IIGA country code
 - Special administrative regions of China (Hong Kong and Macau)
 - Syrian Arab Republic, sometimes abbreviated as SAR, the official name of Syria
 
Business and finance
- Parabolic SAR (stop and reverse), a method of technical stock analysis
 - Saudi Arabian riyal, currency code SAR
 - Stock appreciation right, an employee reward
 
Computing
- sar (Unix) (system activity report), a Unix/Linux performance report utility
 - Segmentation and reassembly, in data networks
 - Service Archive or SAR, a file format related to JAR
 - Shift Arithmetically Right (SAR), an x86 instruction
 - Storage Aspect Ratio of a digital image
 
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
- SAR supergroup (Stramenopiles, Alveolates, and Rhizarians supergroup), a clade within the eukaryotes
 - Scaffold/matrix attachment region or scaffold-attachment region, DNA sequences
 - Sexual Attitude Reassessment
 - Specific absorption rate, of RF energy by the human body
 - 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
 - IPCC Second Assessment Report, 1995 report on climate change
 - Semi-automatic rifle
 - Sodium adsorption ratio, an irrigation water quality parameter
 - Spent Acid Regeneration of sulfuric acid
 - Submarine Advanced Reactor program of USS Triton
 - Successive Approximation Register of a successive-approximation ADC
 - Synthetic-aperture radar, imaging radar
 
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 Arabia Railways, national railway company of Saudi Arabia
 - Savage Alberta Railway, Alberta, Canada, reporting mark
 - South African Railways, now part of Transnet Freight Rail
 - South Australian Railways, 1854–1978
 
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, an uthra (angel) in Mandaeism
 - Sar language, a Bongo–Bagirmi language of southern Chad
 - Sample of Anonymised Records, based on the UK population census
 - 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
 - Super Animal Royale, a 2021 video game developed by Pixile Studios