All articles starting with S
44,216 articles
Safety car
Safety car: official vehicle that neutralizes circuit races, first used in F1 at the 1973 Canadian GP (Porsche 914, Eppie Wietzes). Mercedes-supplied since 1996, driven by Bernd Mayländer since 1999; bunches the field unlike the Virtual Safety Car.
Safety case (nuclear)
A nuclear safety case is the integrated set of arguments and evidence substantiating the safety of a radioactive waste disposal facility, defined by the NEA and IAEA.
Safety coffin
Safety coffin, or security coffin: a burial container with a bell, breathing tube, flag, or escape mechanism for people buried alive. Over 30 German patents in the 1800s; no documented case of one saving anyone.
Safety culture (nuclear)
Safety culture in the nuclear industry is the shared commitment by leaders and individuals to put safety over competing goals, coined by the IAEA after Chernobyl in 1986.
Safety culture in aviation
Safety culture in aviation is the set of shared values, beliefs, and practices concerning safety in an aviation organization, which ICAO treats as essential to safety management systems.
Safety data sheet
A safety data sheet (SDS), formerly a material safety data sheet (MSDS), is a standardized document supplied with hazardous chemicals that communicates hazards, handling precautions, and emergency measures to workplaces.
Safety factor (plasma physics)
The safety factor, denoted q, is a dimensionless parameter in magnetic confinement fusion counting a field line's toroidal turns per poloidal circuit, with higher values giving stability.
Safety filtering
A safety filter is a runtime control module that monitors a primary controller's commands and minimally modifies or overrides them to keep the system within safe constraints.
Safety goggles
Safety goggles are personal protective equipment that seals completely around the eyes against impact, dust, and chemical splashes; chemical splash goggles are required laboratory eyewear where liquids pose a hazard.
Safety in Formula One
Safety in Formula One: the FIA's regulations, car structures, driver equipment (HANS, Halo), circuit design, and medical response protecting F1 drivers; framework rebuilt after the 1994 Imola deaths of Senna and Ratzenberger, with no race-weekend driver deaths since Bianchi in 2014.
Safety integrity level
A safety integrity level (SIL) is one of four levels, SIL 1 lowest to SIL 4 highest, specifying safety integrity requirements of safety functions under the IEC 61508 standards.
Safety Last!
Safety Last! (1923) is a Harold Lloyd silent comedy directed by Fred Newmeyer and Sam Taylor for Hal Roach, famous for the clock-hanging climb on a Los Angeles skyscraper, earning $1.5 million on a $120,000 budget and entering the National Film Registry in 1994.
Safety Management
Safety management: organized policies, structures, and processes (safety management systems, SMS) for identifying hazards and controlling risk. Key frameworks: ILO-OSH 2001, ISO 45001:2018, ICAO Annex 19; evidence shows certified SMS lowers accident rates.
Safety management system
A safety management system (SMS) is a formal, top-down approach to managing safety risk, used most extensively in civil aviation and standardized by ICAO Annex 19 in 2013.
Safety net hospital
Safety net hospitals serve disproportionate numbers of uninsured, Medicaid, and vulnerable patients, supported by DSH payments; quality comparisons show broadly similar Medicare outcomes but longer surgical cancer treatment intervals.
Safety neurons
Safety neurons are small sets of neurons in large language models that causally control safety behavior, chiefly refusing harmful prompts; the concept was introduced in 2025.
Safety Not Guaranteed
Safety Not Guaranteed is a 2012 American science fiction romantic comedy directed by Colin Trevorrow, written by Derek Connolly, starring Aubrey Plaza and Mark Duplass, based on a real 1997 Backwoods Home Magazine ad, made for $750,000 and grossing $4.4 million.
Safety of journalists
Safety of journalists, also known as journalist safety, means working free from threats to physical, psychological, digital, and financial integrity, monitored by the UN and press freedom groups.
Safety pin
Safety pin: a coiled spring-wire fastener with a clasp that shields its point, invented by Walter Hunt, patented April 10, 1849 (US 6,281), sold for $400; distinct from fibulae and quick-release pins.
Safety razor
A safety razor is a shaving implement in which a guard protects the skin so only the blade's edge is exposed, replacing the skill-demanding cut-throat straight razor.
Safety stock
Safety stock, also called buffer stock or reserve stock, is extra inventory held beyond expected demand to protect against forecast error and supply fluctuations, sized statistically to prevent stockouts.
SafetyCulture
SafetyCulture is an Australian workplace safety software company founded by Luke Anear in Townsville in 2004, best known for its iAuditor inspection app; it rebranded as Mitti in 2026.
SafetyPay
SafetyPay is a payments company founded in 2007 and based in Florida whose network lets consumers pay for online purchases by bank transfer or cash, primarily in Latin America.
Safeway
Safeway is an American supermarket chain founded by Marion B. Skaggs in Idaho in 1915; since 2015 it has been a banner of Albertsons Companies.
Safeway (UK)
Safeway was a British supermarket chain that operated independently from 1987 until Morrisons acquired it in 2004; at its height it ran more than 470 stores.
Safexpress
Safexpress is a family-controlled Indian logistics and supply chain company founded by Pawan Jain in 1996, focused on B2B surface express distribution, third-party logistics, and warehousing.
SAFF Championship
SAFF Championship, also SAFF Cup, biennial men's national-team football tournament of the South Asian Football Federation, first played 1993 in Lahore as SAARC Gold Cup; India are dominant champions, defending the 2023 title; 15th edition in Dhaka, November 2026.
Saffarid capture of Nishapur
The Saffarid capture of Nishapur (فتح نیشابور) was Ya'qub ibn al-Layth's seizure of Nishapur, the Tahirid capital in Khurasan, in 873, ending Tahirid rule and bringing him into conflict with the Abbasid caliphate.
Saffarid conquest of Fars and Khurasan
The Saffarid conquest of Fars and Khurasan (فتح فارس و خراسان به دست صفاریان) was the Saffarid dynasty's expansion from Sistan under Ya'qub b. Layth from 861.
Saffarid conquest of Khurasan
The Saffarid conquest of Khurasan (فتح خراسان على يد يعقوب الصفار) was Ya'qub ibn al-Layth's capture of the Tahirid capital Nishapur in 873, ending Tahirid rule over Khurasan.