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Side effect (computer science)
A side effect is an observable change a function makes to a program's state beyond returning a value, such as modifying a variable, file, or hardware.
Side launch
A side launch is a ship launching method in which a vessel drops sideways into the water, used by shipyards on rivers or narrow channels too short for a stern-first launch.
Side platform
A side platform is a railway station platform placed alongside one track, with the platform edge on one side of the rails only; two-track lines typically use a pair, one per direction.
Side-channel attack
A side-channel attack extracts secrets from timing, power, or electromagnetic byproducts of hardware operation; Paul Kocher's 1996 timing attack showed keys leak through execution time.
Side-hole fiber
Side-hole fiber is a polarization-maintaining optical fiber with two parallel air channels running through the cladding on either side of the core, making it birefringent and pressure sensitive.
Sideloading
Sideloading, or side loading, is installing an app from a source other than the official app store, such as a website, alternative marketplace, or direct file transfer.
Siderurgia Nacional
Siderurgia Nacional is Portugal's national steel company, founded in 1954, nationalized in 1975, and privatized in the 1990s; its successors, SN Seixal and SN Maia, now belong to Spain's Megasa.
Sideshows (car culture)
A sideshow, also called a street takeover, is an unsanctioned gathering begun in 1980s Oakland, California, where drivers block intersections and perform stunts like donuts and burnouts.
Sidetone
Sidetone is a telephone user's own speech and nearby room noise, heard in the user's own earpiece; too much or too little makes talkers speak too softly or too loudly.
Sidetrack
A sidetrack is a secondary wellbore drilled away from an original wellbore, either deliberately, as to bypass an irretrievable fish or collapsed casing, or accidentally when the drill string strays.
Sidewalk Infrastructure Partners
Sidewalk Infrastructure Partners is a Brooklyn-based investment and development company, launched in 2019 by Alphabet and the Ontario Teachers' Pension Plan to invest in technology-enabled infrastructure projects and companies.
Sidewheeler
A sidewheeler is a steam-powered vessel with two paddle wheels, one on each side of the hull; it was generally faster and more maneuverable than the sternwheeler.
Sidewinder (robot)
Sidewinder is a modular snake robot from Carnegie Mellon University that in 2014 became the first limbless robot to climb sandy slopes by copying sidewinder rattlesnakes.
Sidi Krir power plant
Sidi Krir power plant is a natural gas-fired power station of about 2,072.6 MW at Sidi Krir on Egypt's Mediterranean coast, built in three stages between the late 1990s and 2010.
Siding (construction)
Siding, also known as wall cladding, is the exterior wall covering that sheds rain and protects a building's walls; common materials include wood, vinyl, and fiber cement.
Sidney Darlington
Sidney Darlington (1906–1997) was an American electrical engineer and circuit theorist at Bell Laboratories from 1929 to 1971, known for the Darlington transistor pair and insertion-loss filter synthesis.
Sidney E. Scisson
Sidney E. Scisson was an American civil engineer and principal officer of Fenix & Scisson, a Tulsa, Oklahoma heavy-construction firm that excavated underground caverns for propane and butane storage.
Sidney J. Green
Sidney J. Green is an American rock-mechanics engineer who founded the Salt Lake City firm TerraTek and was elected to the National Academy of Engineering in 1994.
Sidney Leibovich
Sidney Leibovich, born in 1939, is an American fluid dynamicist and Cornell professor emeritus, known for his theory of Langmuir circulations and vortex breakdown, elected to the National Academy of Engineering in 1993.
Sidney Metzger
Sidney Metzger (1917–2011) was an American communications engineer elected to the National Academy of Engineering in 1976, who worked on secure wartime radio, early satellites, and INTELSAT at COMSAT.
Sidney Yip
Sidney Yip, born 1936 in Beijing, is a Chinese-born materials scientist and MIT professor emeritus known for establishing molecular simulation as a core method in materials science.
Siebel Systems
Siebel Systems, Inc. was an American enterprise software company founded in 1993 by Tom Siebel and Pat House that defined the customer relationship management (CRM) software category until Oracle acquired it in 2006.
Siege engine
A siege engine, also known as a siege weapon or engine of war, is a mechanical weapon of siege warfare, such as catapults, ballistae, and trebuchets.
Siege tower
A siege tower, also called a breaching tower, is a mobile wooden tower on wheels, built taller than a fortress wall so troops could cross onto it.
Siegfried Hecker
Siegfried S. Hecker is an American metallurgist known for plutonium science who served as the fifth director of Los Alamos National Laboratory from 1986 to 1997.
Siegfried Line
The Siegfried Line, German Westwall, was a German fortification system along its western border, built mainly from 1938 to 1940 and breached by American forces in 1944.
Siemens
Siemens is a German industrial technology company headquartered in Munich, founded in Berlin in 1847 to make telegraphs. It spans automation, rail, and medical technology.
Siemens ACS-64
The Siemens ACS-64, also called the Amtrak Cities Sprinter, is a double-ended electric locomotive built by Siemens Mobility for Amtrak's Northeast Corridor, ordered in 2010 to replace the AEM-7 and HHP-8.
Siemens Avanto
The Siemens Avanto is a family of Siemens light rail vehicles and tram-trains, best known as the five-section tram-train SNCF used on Île-de-France tramway Line 4.
Siemens Charger
The Siemens Charger is a family of diesel-electric passenger locomotives built by Siemens Mobility for fast regional and main-line service in North America, meeting EPA Tier 4 emissions standards.