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Southwest Power Pool
Southwest Power Pool is a nonprofit regional transmission organization based in Little Rock, Arkansas, that runs the grid and wholesale power markets across all or part of 17 central and western states.
Southwestern Electric Power Company
Southwestern Electric Power Company, known as SWEPCO, is an American Electric Power utility headquartered in Shreveport, Louisiana, serving 556,100 customers in Louisiana, Texas, and Arkansas since 1912.
Southwestern Energy
Southwestern Energy was an American independent natural gas company headquartered in Spring, Texas, known for discovering the Fayetteville Shale and operating in Appalachia and Haynesville.
Southwestern Public Service Company
Southwestern Public Service Company is a vertically integrated electric utility serving the Texas Panhandle and eastern New Mexico, headquartered in Amarillo, Texas, as a wholly owned subsidiary of Xcel Energy.
Southwire
Southwire, founded by Roy Richards Sr. in Carrollton, Georgia in 1950, is a family-owned maker of wire and cable whose SCR continuous-casting technology produces over half the world's copper rod.
Sovereign AI
Sovereign AI is the practice of governments directing state-backed capital and policy toward artificial intelligence infrastructure, models, and data treated as national strategic assets, concentrated in the Middle East and East Asia.
Sovetsky Soyuz-class battleship
The Sovetsky Soyuz class (Советский Союз, Soviet Union) was a class of Soviet battleships of the late 1930s, of which four were laid down and none completed.
Soviet aircraft carrier Ulyanovsk
Ulyanovsk (Ульяновск) was to have been the Soviet Navy's first true aircraft carrier, laid down in 1988 and scrapped at 20 percent complete in 1992.
Soviet and Russian locomotive classification
Soviet and Russian locomotive classification is a Cyrillic letter-and-digit system in which a locomotive's designation encodes its traction type, transmission, duty, and builder, applied across the whole USSR.
Soviet and Russian sounding rockets
Soviet and Russian sounding rockets are suborbital research vehicles, from R-1 flights with dogs in 1950-1951 to the Vertikal program and thousands of meteorological rocket launches.
Soviet atomic bomb project
The Soviet atomic bomb project, also called the Soviet nuclear program, was the secret USSR effort to develop nuclear weapons, led by Igor Kurchatov and Lavrentiy Beria.
Soviet cruiser Chervona Ukraina (Червона Україна)
Chervona Ukraina (Червона Україна) was a Soviet cruiser sunk by German dive-bombers at Sevastopol on 12 November 1941, the only Soviet cruiser lost in the war.
Soviet Navy warships sunk by aircraft in World War II
German aircraft sank eleven large Soviet Navy warships between 1941 and 1945, mostly in harbor or after prior damage; the leader Tashkent absorbed roughly 300 bombs in one day.
Soviet space dogs
The Soviet space dogs were stray dogs from Moscow flown between 1951 and 1966 to test survival in space, most famously Laika, the first animal to orbit Earth.
Soviet space program
The Soviet space program, known as Kosmicheskaya programma SSSR, was the USSR's state-run spaceflight effort from 1946 until 1991, which put the first satellite, Sputnik, into orbit in 1957.
Soviet steam locomotive classes
Soviet steam locomotive classes were the standardized steam designs of Soviet Railways, replacing the Russian Empire's varied roster with mass-produced types like the SO, FD, L, and SU.
Soviet submarine K-129 (1960)
Soviet submarine K-129 (К-129) was a Golf II ballistic missile submarine of the Soviet Navy that sank with all 98 men aboard in the North Pacific in March 1968.
Soviet submarine K-19
Soviet submarine K-19 was the first nuclear-powered ballistic missile submarine of the Soviet Navy, known for a 1961 reactor accident that killed eight crew members.
Soviet submarine K-219
Soviet submarine K-219 was a nuclear-powered ballistic missile submarine that sank northeast of Bermuda on 6 October 1986, three days after an explosion in a missile tube.
Soviet submarine K-278 Komsomolets
Soviet submarine K-278 Komsomolets (К-278 «Комсомолец») was a unique Soviet nuclear submarine with a titanium hull that sank after a fire in 1989, killing 42 of 69 crew.
Soviet submarine K-3 Leninsky Komsomol
Soviet submarine K-3 Leninsky Komsomol, the first Soviet nuclear-powered submarine, passed under the North Pole in 1962, suffered a deadly 1967 fire, and is now a museum ship in Kronstadt.
Soviet Union and weapons of mass destruction
The Soviet Union maintained one of the world's two largest weapons of mass destruction arsenals from the late 1940s until its dissolution in 1991, spanning nuclear, chemical, and biological arms.
Sovremenny-class destroyer
The Sovremenny-class destroyer, Project 956 or Sarych, is a Soviet guided-missile destroyer for anti-surface warfare and air defense, its main weapon the SS-N-22 Sunburn missile.
Soyang Dam (소양강댐)
Soyang Dam (소양강댐), also known as Soyanggang Dam, is South Korea's largest dam, a 123 m rockfill dam on the Soyang River completed in 1973 that supplies much of the Seoul capital region's water.
Soyuz (spacecraft)
Soyuz (Союз, "Union") is a Soviet and Russian series of crewed spacecraft, first flown in 1967, that has carried crews to Salyut, Mir, and the ISS.
Soyuz (Союз) (rocket family)
Soyuz (Союз, "Union") is a family of Soviet and Russian launch vehicles derived from the R-7 missile, flying since 1966 with more orbital launches than any other rocket.
Soyuz (Союз) (spacecraft)
Soyuz (Союз, "Union") is a Soviet and later Russian crewed spacecraft in service since 1967. Its three-module capsule carries crews to the International Space Station.
Soyuz 1
Soyuz 1 was the first crewed flight of the Soviet Soyuz program, launched April 23, 1967 with Vladimir Komarov aboard, who died when its parachute failed on landing.
Soyuz 11
Soyuz 11 was a 1971 Soviet spaceflight carrying Georgy Dobrovolsky, Vladislav Volkov, and Viktor Patsayev, who became the first crew aboard a space station before dying during reentry.
Soyuz 11A511
Soyuz 11A511 (Союз) was a Soviet carrier rocket designed in the 1960s by Sergei Korolev's OKB-1 specifically to launch the Soyuz spacecraft, flying from 1966 to 1976.