SR

SR or sr may refer to:

Arts and entertainment

 * Science Reporter, a magazine


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

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 (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

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

 * Nissan SR engine
 * Manx SR and SR2, 1970 US kit cars
 * State Route

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