SR

SR or sr may refer to:

Arts and entertainment

• Science Reporter, a magazine
• "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
• Religious sister (Sr.), in Catholicism

Places

• Slovak Republic (Slovak: Slovenská republika), 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^R

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

See also

• All pages with titles containing Sr
• SR-25, a rifle
• Lockheed SR-71 Blackbird, an aircraft
• Cirrus SR20 and Cirrus SR22, a monoplane
• Socialist Republic, as in USSR, ASSR, RSFSR, etc.
• Gibbs SR, a brand of toothpaste
• Senior (disambiguation)