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
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
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)