All articles starting with S
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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 BioTherapeutics
Stealth BioTherapeutics, also known as Mighty Therapeutics, is a Needham, Massachusetts biotechnology company developing therapies for mitochondrial dysfunction; its drug elamipretide won FDA accelerated approval for Barth syndrome in 2025.
Stealth game
A stealth video game is a genre where players use concealment and evasion to avoid direct confrontation. It was popularized by Hideo Kojima's Metal Gear series in 1987.
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
Steam is water in its vapor phase, produced by boiling liquid water, and the working fluid of the steam power industry, carrying about 30% of US manufacturing process heat.
Steam (band)
Steam, the name attached to the 1969 American one-hit wonder "Na Na Hey Hey Kiss Him Goodbye" by Gary DeCarlo, Dale Frashuer and Paul Leka; no such band existed when the Fontana single topped the Billboard Hot 100 for two weeks in December 1969.
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 beer
Steam beer, also called California Common, is an American beer style from Gold Rush-era San Francisco in which lager yeast is fermented at warm ale temperatures without refrigeration; Anchor Brewing trademarked the name.
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 Deck
Steam Deck: Valve's handheld gaming PC (launched February 2022; Steam Deck OLED November 2023), running Arch-based SteamOS 3 with Proton, custom AMD Zen 2/RDNA 2 APU, 7.4-inch OLED, 50 Whr battery, distinct from Nintendo Switch and ROG Ally.
Steam distillation
Steam distillation, also called hydrodistillation, is a technique for separating volatile compounds by co-distilling them with steam, used mainly to extract essential oils from plants.
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 Link
Steam Link: Valve's game-streaming technology, launched as a $50 set-top box on 10 November 2015 and discontinued in 2018, now a free app for Android, iOS, Apple TV, Raspberry Pi, Fire TV, and Meta Quest using Steam Remote Play.
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.
Steam Machine
The Steam Machine is a small-form-factor gaming PC made by Valve that runs SteamOS, with a first generation from third-party makers in 2015 and a 2026 second generation.