All articles starting with S
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Safe mode
Safe mode, also called safe boot, is a diagnostic mode of an operating system that starts with only minimal drivers and services, on Windows, macOS, and Android.
Safe Passage
Safe Passage is a 2019 solo/cooperative chess-set abstract game by Karen Deal Robinson: swap the two kings across the board without any non-pawn piece ever being en prise; also a Ludii chess puzzle and a mobile sliding puzzle.
Safe reinforcement learning
Safe reinforcement learning (safe RL) is the branch of reinforcement learning that learns policies maximizing reward while respecting safety constraints, applied in autonomous driving, robot manipulation, and human-robot interaction.
Safe Room (Succession)
"Safe Room" (Succession season 2, episode 4, HBO, September 1, 2019), written by Georgia Pritchett, directed by Pulcini and Berman; active-shooter lockdown episode introducing Holly Hunter as Rhea Jarrell, 94% on Rotten Tomatoes.
Safe Routes to School
Safe Routes to School (SRTS) is a public program combining infrastructure, education, and encouragement so children can walk or bicycle to school safely. The US federal program ran from 2005 until 2012.
Safe seat
A safe seat, or safe district, is an electoral district the same party wins with a substantial margin at election after election, making the outcome unlikely to change hands.
Safe Security
Safe Security, doing business as SAFE, is a Palo Alto cybersecurity startup founded in 2012 by Saket Modi that sells software measuring and managing enterprise cyber risk.
Safe sex
Safe sex (safer sex): practices reducing STI, HIV, and pregnancy risk via condoms, vaccination, testing, PrEP/PEP, and doxy PEP; distinct from contraception-only methods like IUDs and pills.
Safe Superintelligence $32 billion round
The Safe Superintelligence $32 billion round was a $2 billion investment in Ilya Sutskever's AI lab SSI at a $32 billion valuation, reported in 2025.
Safe Superintelligence Inc.
Safe Superintelligence Inc. (SSI) is an American–Israeli AI research company founded in June 2024 by former OpenAI chief scientist Ilya Sutskever, based in Palo Alto and Tel Aviv.
Safe System approach
The Safe System approach is a road safety strategy that treats traffic deaths as preventable system failures, pioneered in the 1990s by Sweden's Vision Zero and the Netherlands' Sustainable Safety.
Safe yield
Safe yield is a groundwater management concept for how much water an aquifer can supply long-term without unacceptable effects, introduced by Charles H. Lee in 1915.
Safe-haven law
A safe-haven law, or Baby Moses law, is a US state statute letting parents anonymously surrender unharmed newborns without criminal liability, first passed in Texas in 1999.
SAFE-VT study
SAFE-VT (NCT06195475) is a completed multicenter retrospective cohort study from Sanatorio Anchorena San Martín, Buenos Aires, testing whether tidal volume above 8 ml/kg predicted body weight during pressure support ventilation raises ICU mortality in 2,607 ventilated adults.
Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users
The Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (SAFETEA-LU) is a United States federal law enacted in 2005, guaranteeing $244.1 billion for highways, safety, and transit.
Safed
Safed (Tzfat, צפת), a hilltop city in Israel's Upper Galilee at 750–900 m elevation, one of Judaism's four holy cities and a 16th-century Kabbalah center; population about 39,000, captured by the Haganah in May 1948.
Safed (सफेद) (film)
Safed (सफ़ेद) is a 2023 Hindi drama on ZEE5, Sandeep Singh's directorial debut, starring Meera Chopra and Abhay Verma as a widow and a transgender person who become lovers in Varanasi.
SafeGraph, Inc.
SafeGraph, Inc. is an American data-as-a-service company founded in 2016 in Denver, Colorado, led by Auren Hoffman, that curates points-of-interest data and anonymized mobile location data.
Safeguard American Voter Eligibility Act
Safeguard American Voter Eligibility Act (SAVE Act; SAVE America Act, H.R. 7296/S. 3752): proposed U.S. law requiring documentary proof of citizenship, such as a passport or REAL ID, to register to vote in federal elections; passed the House in 2025 and 2026.
Safeguard Mechanism (Australia)
The Safeguard Mechanism is Australia's carbon policy for its largest industrial facilities, requiring emissions to fall below declining baselines; reformed in 2023, it covers over 200 facilities.
SAFES Cohort study
SAFES cohort (Sujet Âgé Fragile : Évaluation et Suivi), NCT02834728: French prospective multicenter cohort of 1,306 patients aged 75+ hospitalized via emergency departments in nine hospitals, 2001–2002, studying mortality, institutionalization, and frailty outcomes.
Safet Sušić
Safet Sušić (Pape), born 1955 in Zavidovići, Bosnian attacking midfielder for FK Sarajevo and Paris Saint-Germain, 54 caps and 21 goals for Yugoslavia, later coach who took Bosnia to the 2014 World Cup.
Safetensors
Safetensors is a tensor serialization format created by Hugging Face in 2022 that stores tensors behind a JSON header, enabling safe, fast model loading without code execution.
Safethrow study
Safethrow study (NCT01065181, Youth Throwers Respond to Stretching), Charles Metzger MD's observational cohort of 1,261 male youth baseball players ages 8-15, testing whether posterior capsular stretch instruction reduces glenohumeral internal rotation deficit (GIRD).
Safety
Safety: protection from accidental harm and the discipline managing it, distinguished from security (deliberate harm). Covers risk assessment, ISO 45001, aviation SMS and ICAO Annex 19, the NTSB, and integrated safety-security methods.
Safety (2020 film)
Safety (2020) is a Disney+ biographical sports drama directed by Reginald Hudlin, starring Jay Reeves as Clemson football player Ray McElrathbey, who secretly raised his brother Fahmarr on campus; released December 11, 2020, 122 minutes, rated PG.
Safety (gridiron football position)
Safety (gridiron football position): deepest defensive back, comprising free safety and strong safety; handles deep pass coverage, run support, and backfield coordination in American football defenses.
Safety (gridiron football score)
Safety (gridiron football score): a two-point defensive score in American and Canadian football when the ball dies behind a team's own goal line by its own impetus or an end-zone foul; followed by a free kick from the 20.
Safety and working environment in shield tunnelling
Safety in shield tunnelling is the occupational control regime for shield machines: hyperbaric working rules, chamber entry, ventilation and fire management, and ground control during mining and ring erection.
Safety bicycle
The safety bicycle, with two equal wheels and chain drive to the rear wheel, replaced the penny-farthing in the late 1880s and remains the standard bicycle design.