Syrian Arab Republic

Sulfuric Acid Recovery (or Regeneration), a common hydrocarbon processing application

Search and rescue

South African Republic

Subscriber Application Router, a class of network routers

Synthetic Aperture Radar, an active microwave remote sensing technology

Suspicious activity report, filed with the US government by financial institutions

Samples of Anonymised Records (SARs), output from the UK Census

Saudi riyal (ISO 4217 currency code SAR)

Singapore Assault Rifle 21

South Australian Railways

Sons of the American Revolution, a genealogically-based community service organization

Stock Appreciation Right

Successive Approximation Register, a chief component of a Successive Approximation ADC

SAR High School, the high school of SAR Academy.

Special Administrative Region, a type of political subdivision in China

Šar mountain in southeastern Europe

South African Railways

Student Aid Report, sent to applicants of US federal financial aid for college

IPCC Second Assessment Report

Segmentation and Reassembly of data packets in a computer network.

SAR Records, a record label

In plant disease resistance Systemic acquired resistance

Specific absorption rate of RF energy by the body from a cellular phone

Son of Ra, a title used by occult societies

Scholars At Risk

Service Archive (.sar), a file format for the JBOSS Java application server computer program

Sar, Tibet

(in microbiology) A naming convention for uncultured bacteria first found in the Sargasso Sea (see SAR11)

(in pharmacology and computational chemistry) structure-activity relationship

Sigma Alpha Rho( High School Fraternity)

Simultaneous Autoregression, used in spatial statistics and geostatistics to model discrete, correlated spatial data.

Structure-activity relationship, used in medicinal chemistry.

the sar (System Activity Report(er)) command for UNIX and Linux which reports computer operating system activity. See "sar(1) manual page"

Sar (river) in Galicia (Spain)

There is also a Saar River, and of course Saarland which is located in the Franco-German borderlands.

Edwin van der Sar, a Dutch soccer goalkeeper currently playing for Manchester United.