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Splitwise
Splitwise, also known as Splitwise.com, is a web and mobile application for tracking shared expenses among friends and roommates, founded in 2011 in Providence, Rhode Island, and known for simplifying group debts into the fewest repayments.
Sploof
A sploof is a handheld filter through which a person exhales smoke to reduce its odor, classically a toilet paper roll stuffed with dryer sheets and sold commercially with carbon and HEPA filters.
Splunk
Splunk is a software platform that ingests, indexes, and searches machine-generated data like logs and security events; Cisco acquired it for about $28 billion in 2024.
SPMD (computing)
SPMD (single program, multiple data) is a parallel programming style in which every processor runs the same program on a different portion of the data.
Spoil tip
A spoil tip, also called a spoil heap or mine dump, is a pile of waste rock and refuse left on the surface by a mine or quarry.
Spoiler (aeronautics)
A spoiler, also known as a lift dumper, is a hinged panel on a wing's upper surface that disrupts airflow to reduce lift and increase drag, serving as speed brakes and ground lift dumpers.
Spoiler (car)
A spoiler is an aerodynamic device on a car, typically a lip on the trunk lid or front bumper, that disrupts airflow to reduce drag or lift, unlike a wing.
Spoke–hub distribution paradigm
The spoke–hub distribution paradigm, usually called the hub-and-spoke model, is a network design that routes traffic through central hubs instead of connecting every pair directly.
Spong model
The Spong model is the standard lumped-parameter model of elastic joint robots, introduced by Mark W. Spong in 1987, treating each joint as a linear torsional spring.
Sponge city
A sponge city is an urban development model where buildings, roads, and green space absorb, store, and slowly release rainwater, best known as China's national stormwater program begun in 2015.
Sponsored top-level domain
A sponsored top-level domain (sTLD) is a specialized DNS domain whose sponsor, representing the affected community, sets eligibility and registration policy, unlike unsponsored TLDs governed through ICANN.
Spontaneous combustion
Spontaneous combustion, also called spontaneous ignition, is fire that starts without an external heat source after a material self-heats, as in oily rags, moist hay, and coal piles.
Spoofing attack
A spoofing attack, also called a masquerade attack, is an attack in which an adversary falsifies an identity, such as an IP address, email sender, or caller ID, to pose as a legitimate party.
Spool valve
A spool valve is a directional control valve in which a cylindrical spool with lands and grooves slides axially in a bore to open, close, and redirect flow.
Sport bike
A sport bike, also written sportbike, is a motorcycle styled like a road racer, with streamlined bodywork and a forward-leaning position, built for handling, acceleration, braking, and cornering.
Sporting Arms and Ammunition Manufacturers' Institute
The Sporting Arms and Ammunition Manufacturers' Institute, or SAAMI, is an American trade association of firearms and ammunition manufacturers, founded in January 1926 at the federal government's request.
Sportradar
Sportradar, also known as Sportradar AG or Betradar, is a Swiss sports technology company in St. Gallen that supplies sports data, betting technology, and match-fixing monitoring to bookmakers.
Sports car
A sports car is a production car designed for speed, high acceleration, and maneuverability, typically low-bodied and seating two, built for high-speed touring on ordinary roads.
Spot (robot)
Spot is a four-legged quadruped robot made by Boston Dynamics, unveiled as SpotMini in 2016 and put on sale in 2019 for industrial inspection and hazardous-environment work.
SPOT (satellites)
SPOT (Satellites Pour l'Observation de la Terre) is a family of French civil Earth-observation satellites developed by CNES and operated from 1986 for mapping and environmental monitoring.
Spot welding
Spot welding, or resistance spot welding, joins overlapping metal sheets by passing high current between water-cooled copper electrodes, melting a small nugget that forms the joint.
SpotBugs
SpotBugs, the successor of FindBugs, is a free, open-source tool that finds bugs in Java programs by scanning compiled bytecode for more than 400 bug patterns.
Spotify
Spotify, also known as Spotify AB, is a Swedish audio streaming service founded in Stockholm in 2006, offering music, podcasts, and audiobooks through free and paid Premium tiers.
Spotlight (Apple)
Spotlight is Apple's system-wide search technology for macOS and iOS, indexing file contents and metadata; announced in 2004, it shipped with Mac OS X Tiger in April 2005.
SpotPass and StreetPass
SpotPass and StreetPass were two communication features of the Nintendo 3DS, introduced in 2010: StreetPass exchanged game data between nearby systems, and SpotPass downloaded content from Nintendo over the internet.
sPower
sPower (FTP Power LLC) is an American independent power producer owning utility-scale solar and wind assets, headquartered in Salt Lake City and acquired by AES and AIMCo in 2017.
Spraberry Trend
The Spraberry Trend is a giant oil-producing area in the Midland Basin of West Texas, discovered in 1949, holding about 10 billion barrels of oil in place.
Sprag clutch
A sprag clutch, also sold as a one-way or freewheel clutch, is a one-way clutch whose tilting sprags transmit torque in one direction and freewheel in the other.
Sprawl (robot)
Sprawl is a family of small, cockroach-inspired hexapedal running robots developed at Stanford University from 1999, achieving fast, stable locomotion over uneven terrain using open-loop control and passive leg compliance.
Spray coating
Spray coating is a contact-free surface-treatment method in which an atomizer breaks liquid coating into droplets deposited onto substrates, used for automotive paint, solar cells, and more.