Stay cable
A stay cable is a tensioned steel member running directly from a bridge tower to the deck, the defining element of cable-stayed bridges since Sweden's Strömsund Bridge of 1955.
Stay cable systems
A stay cable system is the complete engineered product that carries a cable-stayed or extradosed bridge deck in tension from deck to pylon, including strands, anchorages, and dampers.
Stay-cable maintenance and monitoring
Stay-cable maintenance and monitoring is the inspection, condition assessment, and replacement of stay cables on cable-stayed bridges, where corrosion hidden inside anchorages threatens service life.
Staythorpe C power station
Staythorpe C power station is a gas-fired combined cycle power station at Staythorpe, near Newark in Nottinghamshire, England, operated by RWE and connected to the grid in 2010.
STC Orlan-10
The Orlan-10 is a Russian tactical reconnaissance UAV produced by the Special Technology Centre of St Petersburg and used to locate targets for artillery in Syria and Ukraine.
Steady-Hand Eye Robot
The Steady-Hand Eye Robot (SHER) is a cooperatively controlled surgical robot developed at Johns Hopkins University for retinal microsurgery, in which surgeon and robot jointly hold the tool.
Steady-state error
Steady-state error is the difference between a control system's reference input and its output after transients die away, governed by input shape and system type.
Stealth (film)
Stealth (2005) is a Rob Cohen science fiction action film starring Josh Lucas, Jessica Biel, and Jamie Foxx as Navy pilots chasing a rogue AI drone, EDI. It grossed $76 million worldwide on a $135-138 million budget and scored 13% on Rotten Tomatoes.
Stealth aircraft
A stealth aircraft is a military airplane shaped and coated to reduce its radar, infrared, and other signatures, shrinking the range at which enemy radars can detect it.
Stealth Autoguide
The Stealth Autoguide is a miniaturized, remotely operated robotic guidance system made by Medtronic that provides stereotactic positioning during neurosurgical procedures such as biopsy and SEEG.
Stealth helicopter
A stealth helicopter is a rotorcraft modified to reduce its radar, acoustic, and infrared signatures, revealed when one crashed during the 2011 raid that killed Osama bin Laden.
Stealth ship
A stealth ship, or stealth boat, is a naval vessel built to reduce radar, infrared, acoustic, and magnetic signatures to avoid detection and preserve surprise.
Stealth technology
Stealth technology, also called low-observable technology, uses shaping and radar-absorbing materials to reduce military platforms' radar signatures, first entering service with the F-117A in 1983.
Steam (service)
Steam is a digital distribution service for video games run by Valve Corporation, launched in 2003, combining a storefront, game client, and community features for PC gaming.
Steam accumulator
A steam accumulator, also called a Ruths accumulator, is an insulated pressure vessel that stores hot water and releases it as steam when pressure drops.
Steam car
A steam car, or steam automobile, is an automobile driven by a steam engine. It rivaled gasoline and electric cars until the 1910s, when Ford's Model T prevailed.
Steam Controller (2026)
Valve's second-generation Steam Controller (2026), successor to the discontinued 2015 model: dual haptic trackpads, TMR thumbsticks, gyro with Grip Sense, $99, ships early 2026 with Steam Machine and Steam Frame.
Steam cracking
Steam cracking is a petrochemical process that breaks saturated hydrocarbons into smaller alkenes by heating them with steam in pyrolysis furnaces, producing over 97% of the world's ethylene.
Steam engine
A steam engine is a heat engine that converts pressurized steam into mechanical work, either through a piston or a turbine; Newcomen's 1712 engine was the first successful one.
Steam explosion
Steam explosion, also called autohydrolysis, is a pretreatment that heats lignocellulosic biomass with high-pressure steam and rapidly releases the pressure, rupturing cell walls for enzyme conversion.
Steam Frame
The Steam Frame is a standalone virtual reality headset developed by Valve, launched in September 2026 for wireless streaming of a PC's Steam library, replacing the Valve Index.
Steam generator (nuclear power)
A steam generator in a nuclear power plant is a heat exchanger that transfers heat from radioactive primary coolant to a secondary loop, boiling water to drive the turbine.
Steam injection (petroleum)
Steam injection is an enhanced oil recovery method that heats heavy oil reservoirs with steam, cutting viscosity so oil can flow; main schemes include CSS, steam drive, and SAGD.
Steam iron
A steam iron is a hand-held electric clothes iron that heats water in a built-in reservoir and delivers steam through holes in its soleplate, softening fibers to remove wrinkles.
Steam locomotive
A steam locomotive is a self-propelled railway engine that burns fuel to boil water and drive pistons, the dominant form of railway traction for about 150 years.
Steam locomotives of British Railways
The steam locomotives of British Railways, operated from nationalisation on 1 January 1948 to August 1968, mixed engines inherited from the Big Four companies with Riddles' twelve BR Standard classes.
Steam locomotives of China Railway
The steam locomotives of China Railway were dominated by the QJ, JS, and SY classes, with the last regular steam service ending at Sandaoling coal mine in January 2024.
Steam locomotives of Imperial Russia
The steam locomotives of Imperial Russia were letter-designated classes, such as O, Shch, and E, built for the empire's 1,524 mm gauge railways from the 1870s to 1917.
Steam locomotives of Taiwan
The steam locomotives of Taiwan were Japanese-derived classes, including the CT150 and DT650, operated by the TRA until regular steam ended in the early 1980s.
Steam locomotives of the Argentine broad and metre gauge
Steam locomotives of the Argentine broad and meter gauge ran on 5 ft 6 in and 1,000 mm networks; in 1939 a Pacific averaged 65.4 mph over 188 miles.