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
A, or a, is the first letter and the first vowel of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''a'' (pronounced ), plural ''aes' ...
(''Spravedlivaya Rossiya''), a political party formed in 2006
Transport
*
Southern Railway (UK)
The Southern Railway (SR), sometimes shortened to 'Southern', was a British railway company established in the 1923 Grouping. It linked London with the Channel ports, South West England, South coast resorts and Kent. The railway was formed ...
*
Southern Railway (U.S.)
The Southern Railway (also known as Southern Railway Company and now known as the Norfolk Southern Railway) was a class 1 railroad based in the Southern United States between 1894 and 1982, when it merged with the Norfolk & Western to form Nor ...
*
Swissair (IATA airline code SR)
*
Southern Railway zone, India
*
SR Corporation
SR Corporation (, formerly Suseo High Speed Rail Corporation), also known as Supreme Railways, is a South Korean rail operator that operates high-speed rail services. It manages three stations and its trains call at 17 stations.
History
* De ...
, a South Korean rail operator
Other businesses and organizations
*
Sørvágs Róðrarfelag, a Faroese rowing association
*
Saarländischer Rundfunk
Saarländischer Rundfunk (SR; ''Saarland Broadcasting'') is a public radio and television broadcaster serving the German state of Saarland. With headquarters in the Halberg Broadcasting House in Saarbrücken, SR is a member of the ARD consor ...
, a German broadcaster
*
Sveriges Radio, a Swedish broadcaster
Honorifics
* Senior (Sr.), a generational title
suffix to a man's name
*
Religious sister
A religious sister (abbreviated ''Sr.'' or Sist.) in the Catholic Church is a woman who has taken public vows in a religious institute dedicated to apostolic works, as distinguished from a nun who lives a cloistered monastic life dedicated to pra ...
(Sr.), in Catholicism
Places
*
Slovak Republic ( sk, Slovenská republika, links=no), the official name of Slovakia
*
Suriname (ISO 3166-1 country code SR)
*
West Sulawesi
West Sulawesi ( id, Sulawesi Barat) is a province of Indonesia. It is located on the western side of Sulawesi island. It covers an area of 16,787.18 km2, and its capital is Mamuju. The 2010 Census recorded a population of 1,158,651, while ...
(ISO 3166-2:ID province code SR), a province of Indonesia
Science and technology
Biology and medicine
*
SR protein
SR proteins are a conserved family of proteins involved in RNA splicing. SR proteins are named because they contain a protein domain with long repeats of serine and arginine amino acid residues, whose standard abbreviations are "S" and "R" respe ...
, involved in RNA splicing
*
Sarcoplasmic reticulum
The sarcoplasmic reticulum (SR) is a membrane-bound structure found within muscle cells that is similar to the smooth endoplasmic reticulum in other cells. The main function of the SR is to store calcium ions (Ca2+). Calcium ion levels are ke ...
, a structure found within muscle cells
*
Sustained release, in medicine
Chemistry and physics
*
Steradian
The steradian (symbol: sr) or square radian is the unit of solid angle in the International System of Units (SI). It is used in three-dimensional geometry, and is analogous to the radian, which quantifies planar angles. Whereas an angle in radian ...
(symbol: sr), the SI unit of solid angle
*
Strontium (symbol: Sr), a chemical element
Computing and electronics
*
.sr
.sr is the Internet country code top-level domain (ccTLD) for Suriname
Suriname (; srn, Sranankondre or ), officially the Republic of Suriname ( nl, Republiek Suriname , srn, Ripolik fu Sranan), is a country on the northeastern Atlantic c ...
, the Internet top-level domain for Suriname
*
SR flip-flop circuit, an electronic logic device
*
SR programming language
*
Segment routing
Segment routing, a form of computer networking, is a modern variant of source routing that is being developed within thSPRINGand IPv6 working groups of the IETF. In a segment routed network, an ingress node may prepend a header to packets that ...
, a form of computer networking
*
Slew rate
In electronics, slew rate is defined as the change of voltage or current, or any other electrical quantity, per unit of time. Expressed in SI units, the unit of measurement is volts/second or amperes/second, but is usually expressed in terms of m ...
, the maximum rate of change of electrical signals
*
Sound reinforcement
A sound reinforcement system is the combination of microphones, signal processors, amplifiers, and loudspeakers in enclosures all controlled by a mixing console that makes live or pre-recorded sounds louder and may also distribute those sound ...
, a system to make sounds louder
*
Student Robotics, a robot-building competition
* Surround Right (SR), a speaker on a
5.1 surround sound
5.1 surround sound ("five-point one") is the common name for surround sound audio systems. 5.1 is the most commonly used layout in home theatres. It uses five full bandwidth channels and one low-frequency effects channel (the "point one"). Dol ...
setup
Transport
*
Nissan SR engine
The SR engine is a series of , or straight-four, four-stroke gasoline engines manufactured by Nissan. It has an aluminum head and cast-iron block with steel sleeves and has a DOHC 4-valve design, with variable valve timing on select models.
...
*
Manx SR and SR2, 1970 US kit cars
*
State Route
A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either ''numbered'' or ''maintained'' by a sub-national state or province. A road numbered by a ...
Other uses
*
Strike rate (s/r), a statistic in cricket
*
Saudi riyal (currency symbol: SR), the currency of Saudi Arabia
*
Serbian language
Serbian (, ) is the standardized variety of the Serbo-Croatian language mainly used by Serbs. It is the official and national language of Serbia, one of the three official languages of Bosnia and Herzegovina and co-official in Montenegro and K ...
(ISO-639-1 language code: sr)
*
Slot receiver, a position in American football
*
Special reconnaissance
Special reconnaissance (SR) or Recon Team is conducted by small units of highly trained military personnel, usually from special forces units or military intelligence organizations, who operate behind enemy lines, avoiding direct combat and detec ...
, a military tactic
**
United States Air Force Special Reconnaissance
Special Reconnaissance (SR)—formerly Special Operations Weather Technician or Team (SOWT)—is conducted by trained Air Force personnel assigned to Special Tactics Squadrons of the United States Air Force Special Operations Command who op ...
See also
*
*
SR-25
The SR-25 (Stoner Rifle-25) is a designated marksman rifle and semi-automatic sniper rifle designed by Eugene Stoner and manufactured by Knight's Armament Company.
The SR-25 uses a rotating bolt and a direct impingement gas system. It is loose ...
, a rifle
*
Lockheed SR-71 Blackbird, an aircraft
*
Cirrus SR20
The Cirrus SR20 is an American piston-engined, four- or five-seat composite monoplane built since 1999 by Cirrus Aircraft of Duluth, Minnesota. The aircraft is the company's earliest type-certified model, earning certification in 1998.
It was t ...
and Cirrus SR22, a monoplane
*
Socialist Republic
Socialism is a left-wing economic philosophy and movement encompassing a range of economic systems characterized by the dominance of social ownership of the means of production as opposed to private ownership. As a term, it describes the ec ...
, as in USSR, ASSR, RSFSR, etc.
*
Gibbs SR
Mentadent is a brand name for a line of dental products manufactured by Unilever for its home and international markets excluding the United States and Canada where the company sold its rights to the brand to Church & Dwight Company in 2003.
In ...
, a brand of toothpaste
*
Senior (disambiguation)
{{Disambiguation