SR or sr may refer to:

Arts and entertainment

  • Science Reporter, a magazine

<!--* Shire Reckoning, a fictional calendar in J. R. R. Tolkien's Middle-earth (fails WP:DABACRO)-->

  • "Sr.", a 2022 film featuring Roberts Downey Jr. and Sr.

Businesses and organizations

Politics

  • Socialist Revolutionary Party, Russia, 1902–1941
  • A Just Russia (Spravedlivaya Rossiya), a political party formed in 2006

Transport

  • Southern Railway (UK)
  • Southern Railway (U.S.)
  • Swissair (IATA airline code SR)
  • Southern Railway zone, India
  • SR Corporation, a South Korean rail operator

Other businesses and organizations

  • Sørvágs Róðrarfelag, a Faroese rowing association
  • Saarländischer Rundfunk, a German broadcaster
  • Sveriges Radio, a Swedish broadcaster

Honorifics

  • Senior (Sr.), a generational title suffix to a man's name

<!--* Señor, a Spanish honorific prefix, equivalent to Mr. in English (see MOS:DABFOREIGN)-->

  • Religious sister (Sr.), in Catholicism

Places

  • Slovak Republic (), the official name of Slovakia
  • Suriname (ISO 3166-1 country code SR)
  • West Sulawesi (ISO 3166-2:ID province code SR), a province of Indonesia

Science and technology

Biology and medicine

  • SR protein, involved in RNA splicing
  • Sarcoplasmic reticulum, a structure found within muscle cells
  • Sustained release, in medicine

Chemistry and physics

  • Steradian (symbol: sr), the SI unit of solid angle
  • Strontium (symbol: Sr), a chemical element

Computing and electronics

  • .sr, the Internet top-level domain for Suriname
  • SR flip-flop circuit, an electronic logic device
  • SR programming language
  • Segment routing, a form of computer networking
  • Slew rate, the maximum rate of change of electrical signals
  • Sound reinforcement, a system to make sounds louder
  • Student Robotics, a robot-building competition
  • Surround Right (SR), a speaker on a 5.1 surround sound setup

Transport

  • Codename of the 1992 to 2002 Dodge Viper
  • Nissan SR engine
  • Manx SR and SR2, 1970 US kit cars
  • State Route
  • Rockaway Park Shuttle in New York City, sometimes signed in documents as S<sup>R</sup>

Other uses

  • Strike rate (s/r), a statistic in cricket
  • Saudi riyal (currency symbol: SR), the currency of Saudi Arabia
  • Serbian language (ISO-639-1 language code: sr)
  • Slot receiver, a position in American football
  • Special reconnaissance, a military tactic
  • United States Air Force Special Reconnaissance
  • Sudurpaschim Royals, a professional Twenty20 cricket franchise representing Sudurpashchim Province, Nepal in the Nepal Premier League

<!--* Semi-rimmed in firearms (fails WP:DABACRO)-->

See also

  • SR-25, a rifle<!--see WP:PTM-->
  • Lockheed SR-71 Blackbird, an aircraft<!--see WP:PTM-->
  • Cirrus SR20 and Cirrus SR22, a monoplane<!--see WP:PTM-->
  • Socialist Republic, as in USSR, ASSR, RSFSR, etc.<!--see WP:PTM-->
  • Gibbs SR, a brand of toothpaste
  • Senior (disambiguation)