SR

SR may refer to:

Arts and entertainment

Film, television and literature

• School Rumble, an anime and manga series
• Speed Racer, a manga and anime series from the 60s
  • Speed Racer (film), a live-action adaptation of the anime series
• Superman Returns, a 2006 film based on the iconic superhero
• Skarloey Railway, a fictional railway in both The Railway Series and Thomas the Tank Engine and Friends by W.V. Awdry

Gaming

• Saints Row (series), a video game series
  • Saints Row (video game), the first title in the series
• Shadowrun, a cyberpunk fantasy roleplaying game
• Several video games featuring Sonic the Hedgehog, including:
  • Sonic R
  • Sonic Riders
  • Sonic Rush
• Soul Reaver, the sequel to Blood Omen in the Legacy of Kain series
• Space Rangers (video game), a turn-based space trading and combat simulator

Music

• Suburban Rhythm, a ska/punk band
• Straylight Run, an American alternative/indie band
• Simply Red, a pop/rock band
• Steve Rothery, a guitarist of Marillion
• Sigur Rós, an Icelandic post-rock band

Businesses and organizations

Political organizations

• Socialist-Revolutionary, as in the Russian Socialist-Revolutionary Party, operative 1902-1940
• A Just Russia (Spravedlivaya Rossiya), a Russian political party, formed in 2006

Transportation

• Saunders-Roe, a former British aircraft manufacturer
• Southern Railway Zone, a zone in Indian Railways
• Southern Railway (United Kingdom)
• Southern Railway (U.S.)
• Swissair (IATA airline code SR)

Other businesses and organizations

• Sørvágs Róðrarfelag, a Faroese rowing association
• Saarländischer Rundfunk, a German regional public broadcasting company
• Sands Regency, a hotel and casino located in Reno, Nevada
• Siena Reno, a hotel and former casino located in Reno, Nevada
• Sveriges Radio, a Swedish national publicly funded radio broadcasting company

Geography

• Slovak Republic, official political name of Slovakia
• Socialist Republic or socialist state, as in USSR, ASSR, RSFSR, etc
• Suriname, a country in South America

Honorifics

• Senior, a generational suffix to a person's name, usually male
• Señor, a Spanish honorific prefix, equivalent to Mr. in English
• Sister, a prefix to a religious sister's name

Science and technology

Biology and medicine

• SR protein, a type of proteins which are involved in regulating and selecting splice sites in eukaryotic mRNA
• Sarcoplasmic reticulum, a structure found within muscle cells
• Sedimentation rate, shortened form for Erythrocyte sedimentation rate
• Sinus rhythm, the pattern made by a healthy heart on an electrocardiogram
• Sustained release or slow release formulation of a medicine, e.g. Wellbutrin SR

Chemistry

• Sodium ricinoleate, a compound used in SR toothpaste
• Steam reforming, the catalytic reaction of hydrocarbon with steam
• Strontium, a chemical element of the alkaline earth metals group

Computing and electronics

• .sr, Suriname's Internet top-level domain
• SR flip-flop circuit, an electronic logic device
• SR programming language, a concurrent computer programming language
• Selective repeat, a type of Automatic Repeat-reQuest Protocol
• Shift register, a group of processor registers set up in a linear fashion
• Slew rate, the maximum rate of change of electrical signals
• Sound reinforcement, a high-power audio system
• Speech recognition, the process of converting speech to text
• Student Robotics, a competition for 16- to 18-year-olds to build robots
• Symbol rate, in data transmission

Vehicles

• Nissan SR engine
• Sun Roof, in motor sales advertising
• Saunders-Roe, a former British aircraft manufacturer
• Manx SR and SR2, 1970 American kit cars based on the Volkswagen Beetle frame
• Strategic Reconnaissance, a code used for the Blackbird (plane)

Other uses in science and technology

• Single-reduction, a type of steam turbine
• Special relativity, a theory of space and time created by physicist Albert Einstein
• Steradian, the SI unit of solid angle
• Stimulus-response, in psychology or criminology
• Synchrotron radiation, electromagnetic radiation from charged particles moving in magnetic fields
• Systematic review, or standardized review

Other uses

• Saudi riyal, the currency of Saudi Arabia
• Scoville rating, a measure of the "hotness" of a chili pepper
• Serbian language (ISO-639-1 code)
• Sincere regards (s/r), a form of valediction
• Spelling reform, demonstrably different from simplified spelling
• Slot receiver, a position in American football
• State route, a designation for highways in some American states
• Steel Reserve, an alcoholic beverage