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SpudCell
SpudCell is a synthetic cell built in 2026 at the University of Minnesota from nonliving chemicals, described as the first to complete a full cellular life cycle.
Spur gear
A spur gear is a cylindrical gear with straight teeth parallel to the axis of rotation, transmitting power between parallel shafts. It is the most widely used gear type.
Spurlock power station
Spurlock power station, formally the Hugh L. Spurlock Generating Station, is East Kentucky Power Cooperative's largest facility, a four-unit coal-fired plant on the Ohio River in Mason County, Kentucky.
Sputnik 1 (Спутник-1)
Sputnik 1 (Спутник-1) was the world's first artificial Earth satellite, a 58 cm aluminum sphere the Soviet Union launched on 4 October 1957, opening the Space Age.
Sputnik 2 (Спутник-2)
Sputnik 2, also known as Sputnik II, was the second Soviet artificial satellite, launched on November 3, 1957, carrying the dog Laika, the first animal to orbit Earth.
Sputnik crisis
The Sputnik crisis, also known as the Sputnik shock or Sputnik moment, was American public alarm after the Soviet Union launched Sputnik 1, the first artificial satellite, in 1957.
Sputter deposition
Sputter deposition, also called vacuum sputtering, is a physical vapor deposition technique that ejects atoms from a target to form thin films on a substrate.
Spyker Cars
Spyker Cars is a Dutch manufacturer of hand-built sports cars, founded in 1999 by Victor Muller to revive the Spyker marque, and known for its limited-production C8 series.
Spyware
Spyware, also called surveillance software, is malware secretly installed to gather information without the user's knowledge, ranging from phone stalkerware to government tools like Pegasus.
SQL
SQL, or Structured Query Language, is the standard language for defining, querying, and controlling data in relational databases, developed at IBM in 1974 and standardized by ISO and ANSI.
SQL injection
SQL injection (SQLIA), also known as Structured Query Language injection, is a code injection attack where user input is interpreted as SQL code rather than data, letting attackers extract or alter database contents.
SQL Server Express
SQL Server Express, also known as Microsoft SQL Server Express, is the free edition of Microsoft SQL Server, limited to 4 cores, 1,410 MB of memory, and 50 GB per database.
SQL Server Integration Services
SQL Server Integration Services (SSIS) is a Microsoft platform for building data integration and ETL solutions for data warehousing, replacing DTS and now also hosted in Azure.
SQL Server Reporting Services
SQL Server Reporting Services, also known as SQL Reporting Services (SSRS), is a Microsoft server-based reporting platform for paginated, print-ready reports, first released with SQL Server 2000 in 2004.
SQL Slammer
SQL Slammer, also known as the Sapphire worm, was a computer worm released in January 2003 that infected over 75,000 hosts running Microsoft SQL Server 2000 within minutes.
SQL standardization
SQL standardization defines the SQL database language as the international standard ISO/IEC 9075, first published by ANSI in 1986 and adopted by ISO in 1987.
SQL:1999
SQL:1999, also known as SQL3, is the third generation of the SQL database language standard, published in December 1999 with object technology its headline addition.
SQL/PGQ
SQL/PGQ (ISO/IEC 9075-16:2023) is Part 16 of SQL:2023, defining property graph creation over relational tables and GRAPH_TABLE pattern matching; implemented in Oracle 23ai and DuckPGQ, reverted from PostgreSQL 19.
SQLGlot
SQLGlot is a dependency-free Python SQL parser, transpiler, optimizer, and engine by Toby Mao, translating between 30+ dialects such as DuckDB, Spark, Snowflake, and BigQuery via a recursive descent parser and AST.
SQLite
SQLite is a self-contained, serverless, transactional SQL database engine stored in a single cross-platform disk file, with no separate server process, and its code is public domain.
SQLMesh
SQLMesh is an open source SQL/Python data transformation framework by Tobiko Data, later Fivetran and the Linux Foundation. Known for SQLGlot semantic parsing, Terraform-style plan/apply, virtual environments, and dbt compatibility.
Squad automatic weapon
A squad automatic weapon (SAW) is a lightweight, one-man-portable automatic weapon issued at infantry squad level to suppress the enemy; in US service it names the M249.
Squad Mission Equipment Transport
The Squad Mission Equipment Transport, officially the Squad Multipurpose Equipment Transport (SMET), is a US Army robotic mule that carries a squad's equipment and generates electrical power.
Squadron (aviation)
A squadron in aviation is the basic military air unit, made up of two or more flights and smaller than a group or wing, in air forces worldwide.
Square (video game company)
Square Co., Ltd., also known as SquareSoft, was a Japanese video game developer founded in September 1986, best known for the Final Fantasy series and its merger with Enix.
Square Kilometre Array
The Square Kilometre Array (SKA) is an intergovernmental radio telescope project using arrays in Western Australia and South Africa, operated by the SKA Observatory from the United Kingdom.
Squarespace
Squarespace is an all-in-one software-as-a-service platform for building and hosting websites, offering templates, e-commerce, and domains, founded by Anthony Casalena and taken private by Permira in 2024 for about $7.2 billion.
Squat effect
The squat effect is the drop in a ship's under-keel clearance when moving through shallow or restricted water, caused by low pressure beneath the hull and increasing with speed.
Squat toilet
A squat toilet, also called a Turkish or Indian toilet, is a toilet used in a squatting posture, common across much of Asia, Africa, and the Middle East.
Squawk code
A squawk code is a four-digit transponder number a pilot enters so air traffic control radar can identify the aircraft, with 7500, 7600, and 7700 reserved for emergencies.