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 (), 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 SR
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
See also
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)