SAR or Sar may refer to:

Places

Sar (river) The Sar is a river in Galicia, Spain. Rising near Santiago de Compostela, it flows through the A Maía valley for over before entering the Ulla (river), Ulla River, near Padrón. Pomponius Mela (d. 45 AD) mentions it (''Sars'') in ''De sit ...

, Galicia, Spain *

Sar, Bahrain Sar or Saar () is a residential town in Bahrain, to the west of the capital, Manama. It is known for its beautiful landscaping and greenery. Education # St. Christopher's School # University College of Bahrain Al Mahd Day Boarding School The B ...

, a residential district * Sar, Iran (disambiguation), several places in Iran * Sar, Tibet, Tibet Autonomous Region of China * Šar Mountains, in southeastern Europe *

Sark Sark (Sercquiais: or , ) is an island in the southwestern English Channel, off the coast of Normandy, and part of the archipelago of the Channel Islands. It is a self-governing British Crown Dependencies, Crown Dependency, with its own set o ...

, a Channel Island, IIGA country code *

Special administrative regions of China The special administrative regions (SAR) of the People's Republic of China are one of four types of Province-level divisions of China, province-level divisions of the China, People's Republic of China directly under the control of its S ...

Syrian Arab Republic Syria, officially the Syrian Arab Republic, is a country in West Asia located in the Eastern Mediterranean and the Levant. It borders the Mediterranean Sea to the west, Turkey to Syria–Turkey border, the north, Iraq to Iraq–Syria border, t ...

, 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 Stock appreciation rights (SAR) is a method for companies to give their management or employees a bonus if the company performs well financially. Such a method is called a 'plan'. SARs resemble employee stock options in that the holder/employee b ...

, an employee reward

Computing

sar (Unix) System Activity Report (sar) is a Unix System V-derived system monitor command used to report on various system loads, including CPU activity, memory/paging, interrupts, device load, network and swap space utilization. Sar uses /proc filesys ...

(system activity report), a Unix/Linux performance report utility *

Segmentation and reassembly Segmentation and reassembly (SAR) is the process used to fragment and reassemble variable length Network packet, packets into fixed length cells so as to allow them to be transported across Asynchronous Transfer Mode (ATM) networks or other c ...

, in data networks * Service Archive or SAR, a file format related to

JAR A jar is a rigid, cylindrical or slightly conical container, typically made of glass, ceramic, or plastic, with a wide mouth or opening that can be closed with a lid, screw cap, lug cap, cork stopper, roll-on cap, crimp-on cap, press-on ca ...

* Shift Arithmetically Right (SAR), an x86 instruction *

Storage Aspect Ratio The aspect ratio of an image is the ratio of its width to its height. It is expressed as two numbers separated by a colon, in the format width:height. Common aspect ratios are 1.85:1 and 2.39:1 in cinematography, 4:3 and 16:9 in television, and 3 ...

of a digital image

Law enforcement

Search and rescue Search and rescue (SAR) is the search for and provision of aid to people who are in distress or imminent danger. The general field of search and rescue includes many specialty sub-fields, typically determined by the type of terrain the search ...

Nationwide Suspicious Activity Reporting Initiative The Nationwide Suspicious Activity Reporting (SAR) Initiative (NSI) is a program of the United States government used to collect and share reports of suspicious activity by people in the United States. The Nationwide SAR Initiative (NSI) builds o ...

, US *

Suspicious activity report In financial regulation, a Suspicious Activity Report (SAR) or Suspicious Transaction Report (STR) is a report made by a financial institution about suspicious or potentially suspicious activity as required under laws designed to counter money lau ...

, by a financial institution to an authority

Science

Medicine, psychology, and biology

SAR supergroup SAR is a highly diverse clade of eukaryotes, often considered a supergroup, that includes stramenopiles (heterokonts), alveolates, and rhizarians. It is a node-based taxon (under the Sar name), including all descendants of the three groups' ...

(Stramenopiles, Alveolates, and Rhizarians supergroup), a clade within the eukaryotes *

Scaffold/matrix attachment region The term S/MAR (scaffold/matrix attachment region), otherwise called SAR (scaffold-attachment region), or MAR (matrix-associated region), are sequences in the DNA of eukaryotic chromosomes where the nuclear matrix attaches. As architectural DNA co ...

or scaffold-attachment region, DNA sequences *

Sexual Attitude Reassessment A Sexual Attitude Reassessment, sometimes Sexual Attitude Restructuring (SAR), seminar is a process-oriented, structured group experience to promote participants' awareness of their attitudes and values related to sexuality, and to assist them in ...

Specific absorption rate Specific absorption rate (SAR) is a measure of the rate at which energy is absorbed per unit mass by a human body when exposed to a radio frequency (RF) electromagnetic field. It is defined as the power absorbed per mass of tissue and has unit ...

, of RF energy by the human body *

Structure–activity relationship The structure–activity relationship (SAR) is the relationship between the chemical structure of a molecule and its biological activity. This idea was first presented by Alexander Crum Brown and Thomas Richard Fraser at least as early as 1868. Th ...

, of biological effect of a molecule *

Systemic acquired resistance Systemic acquired resistance (SAR) is a "whole-plant" resistance response that occurs following an earlier localized exposure to a pathogen. SAR is analogous to the innate immune system found in animals, and although there are many shared aspects b ...

, of a plant to a pathogen

Science and technology

Sar (astronomy) The saros () is a period of exactly 223 synodic months, 18 years 11 days and 8 hours, that can be used to predict eclipses of the Sun and Moon. One saros period after an eclipse, the Sun, Earth, and Moon return to approximately the same relative g ...

, 9 years 5 days, a period separating eclipses *

SAR 21 The SAR 21 ("Singapore Assault Rifle - 21st Century") is a bullpup assault rifle designed and manufactured in Singapore, chambered for the 5.56x45mm cartridge. First revealed and subsequently adopted by the Singapore Armed Forces (SAF) as its s ...

, Singapore Assault Rifle 21st century * SAR-87 (

Sterling SAR-87 The Sterling SAR-87 is a military assault rifle of the late 20th century. The Sterling Assault Rifle (SAR), which included elements from Sterling's earlier Light Automatic Rifle (LAR) design, was jointly engineered by Sterling Armaments Company ...

), 1980s military assault rifle *

IPCC Second Assessment Report The Second Assessment Report (SAR) of the Intergovernmental Panel on Climate Change (IPCC), published in 1995, is an assessment of the then available scientific and socio-economic information on climate change. The report was split into four parts ...

, 1995 report on climate change *

Semi-automatic rifle A semi-automatic rifle is a type of rifle that fires a single round each time the Trigger (firearms), trigger is pulled while automatically loading the next Cartridge (firearms), cartridge. These rifles were developed Pre-World War II, and w ...

Sodium adsorption ratio The sodium adsorption ratio (SAR) is an irrigation water quality parameter used in the management of sodium-affected soils. It is an indicator of the suitability of water for use in agricultural irrigation, as determined from the concentrations of t ...

, an irrigation water quality parameter * Spent Acid Regeneration of

sulfuric acid Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid (English in the Commonwealth of Nations, Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen, ...

* Submarine Advanced Reactor program of USS ''Triton'' * Successive Approximation Register of a

successive-approximation ADC A successive-approximation ADC (or SAR ADC) is a type of analog-to-digital converter (ADC) that Digitization, digitizes each Sampling (signal processing), sample from a continuous analog waveform using a binary search through all possible Quanti ...

Synthetic-aperture radar Synthetic-aperture radar (SAR) is a form of radar that is used to create two-dimensional images or three-dimensional reconstructions of objects, such as landscapes. SAR uses the motion of the radar antenna over a target region to provide fine ...

, imaging radar

Organizations

SAR Academy Salanter Akiba Riverdale Academy, better known by the acronym, SAR Academy, is a coeducational, private Modern Orthodox Jewish day school. The school is located in the Riverdale section of the New York City borough of the Bronx. Its name de ...

, yeshiva in Riverdale, New York, US ** SAR High School, the high school of SAR Academy * SAR Records, an American record label *

Scholars at Risk Scholars at Risk (SAR) is an international network of academic institutions organized to support and defend the principles of academic freedom and to defend the human rights of scholars around the world. As of 2024, network membership is reported ...

, a network supporting academic freedom *

School for Advanced Research The School for Advanced Research (SAR), until 2007 known as the School of American Research and founded in 1907 as the School for American Archaeology (SAA), is an advanced research center located in Santa Fe, New Mexico, United States. Since 1 ...

in anthropology and related fields, Santa Fe, New Mexico, US *

Sigma Alpha Rho Sigma Alpha Rho () is a North American Jewish high school fraternity. It was founded on November 18, 1917, in West Philadelphia, Pennsylvania. However, by 2017, all of its chapters had gone dormant, with only alumni members remaining. The SAR Alu ...

, a high school fraternity, Philadelphia, Pennsylvania, US *

Society for Artistic Research The Society for Artistic Research (SAR) is an international nonprofit, artistic and scientific society devoted to developing, linking and disseminating internationally artistic research as a specific practice of producing knowledge. SAR also aims t ...

Sons of the American Revolution The Sons of the American Revolution (SAR), formally the National Society of the Sons of the American Revolution (NSSAR), is a federally chartered patriotic organization. The National Society, a nonprofit corporation headquartered in Louisvi ...

, US organisation

Railways

Saudi Arabia Railways Saudi Arabia Railways (SAR; ), formerly the Saudi Railway Company, is the national railway company of Saudi Arabia. It is de facto a state-owned enterprise, as it is owned by the PIF. Saudi Railways Organization was a major railway operator i ...

, national railway company of

Saudi Arabia Saudi Arabia, officially the Kingdom of Saudi Arabia (KSA), is a country in West Asia. Located in the centre of the Middle East, it covers the bulk of the Arabian Peninsula and has a land area of about , making it the List of Asian countries ...

* Savage Alberta Railway, Alberta, Canada, reporting mark *

South African Railways Transnet Freight Rail is a Rail transport in South Africa, South African rail transport company, formerly known as Spoornet. It was part of the South African Railways and Harbours Administration, a state-controlled organisation that employed h ...

, now part of Transnet Freight Rail *

South Australian Railways South Australian Railways (SAR) was the organisation through which the Government of South Australia built and operated railways in South Australia from 1854 until March 1978, when its non-urban railways were incorporated into Australian Natio ...

, 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 Sar or Sara, also known as Madjingay and Sara Madjingay is a Bongo–Bagirmi language of southern Chad, and the lingua franca of regional capital of Sarh Semi-active radar homing (SARH) is a common type of missile guidance system, perhaps th ...

, 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 The Data Protection Act 1998 (c. 29) (DPA) was an act of Parliament of the United Kingdom designed to protect personal data stored on computers or in an organised paper filing system. It enacted provisions from the European Union (EU) Data Pro ...

, in data protection law * '' Super Animal Royale'', a 2021 video game developed by Pixile Studios