All articles A–Z

Software update

A software update is a modification to code that corrects security or functionality problems in software, and is the primary mechanism for fixing vulnerabilities after software ships.

Software versioning is the practice of assigning unique identifiers to distinct states of a software product so that changes, compatibility, and releases can be tracked, most commonly through semantic version numbers.

Software-defined networking

Software-defined networking (SDN) is an approach to computer networking that separates the control plane from the forwarding plane, letting administrators program network behavior through software via open interfaces such as OpenFlow.

Oct 15, 2026

Software-defined perimeter

A software-defined perimeter (SDP) is a network security architecture developed by the Cloud Security Alliance that authenticates users and devices before granting access, keeping applications invisible or "dark."

Software-defined radio

A software-defined radio (SDR), also called a software radio, is a radio communication system in which functions like filtering, modulation, and demodulation run as modifiable software on programmable processors.

Oct 15, 2026

Software-defined vehicle

A software-defined vehicle is a vehicle whose functions are defined and updated primarily through software rather than fixed hardware, gaining new features over its life cycle.

Sep 29, 2026

Software-in-the-loop simulation

Software-in-the-loop (SIL) simulation is a verification method that runs control software compiled for a host computer against a simulated plant model, checking code behavior before target hardware exists.

Oct 15, 2026

SoftWear Automation

SoftWear Automation is an Atlanta-based robotics company launched in 2012 at Georgia Tech with DARPA funding, known for its Sewbot worklines that use machine vision to automate sewing T-shirts.

Softwood

Softwood is wood produced by gymnosperm trees, botanically the cone-bearing conifers with needle- or scale-like evergreen leaves, a name that is a well-known misnomer since some softwoods are harder than some hardwoods.

Sofya Muratova

Sofya Muratova (Софья Ивановна Муратова, 1929–2006), Soviet artistic gymnast, two-time Olympic team champion (1956, 1960) with eight Olympic medals, five-time USSR all-around champion, wife of Valentin Muratov, later coach.

Sep 19, 2026

Sofya of Axum

Sofya of Axum, remembered in Ethiopian tradition as Ahyäwa Sofya, is an early fourth-century queen of Aksum, traditionally ruling when Christianity was introduced to the kingdom.

Sofya Tikhonova

Sofya Tikhonova (Софья Дмитриевна Тихонова), Russian ski jumper born 1998 in St. Petersburg; 2016 Youth Olympic gold and silver medalist who also competed at the 2018 and 2022 Winter Olympics.

Sofya Velikaya

Sofya Velikaya (Софья Александровна Великая), born 1985 in Almaty, Russian sabre fencer; two-time Olympic team sabre champion (2016, 2020), three-time individual Olympic silver medallist, eight-time world champion, first woman to win Olympic team sabre gold twice.

Sofyan Amrabat (سفيان عمرابط)

Sofyan Amrabat (سفيان عمرابط), born 1996 in Huizen, Netherlands, is a Moroccan defensive midfielder (Ajax, formerly Fiorentina, Manchester United loan, Fenerbahçe) and 2022 World Cup semi-finalist with Morocco.

Soga clan

The Soga clan (蘇我氏) was a powerful ministerial lineage that dominated the Yamato court from the mid-6th century until 645, championing Buddhism and placing relatives on the throne.

Soga no Emishi

Soga no Emishi (蘇我蝦夷) was the leader of the Soga clan and grand minister of the Yamato court from 626, deciding two imperial successions before his suicide in 645.

Soga no Iname

Soga no Iname (蘇我稲目, c. 506–570) was chief minister of the Yamato court under Emperors Senka and Kinmei, who championed Buddhism, built Japan's first temple, and made the Soga kin of emperors.

Soga no Iruka

Soga no Iruka (蘇我入鹿) was a powerful Soga clan minister of Asuka Japan, son of Soga no Emishi, assassinated in the Isshi Incident of 645.

Soga no Iruka's destruction of Prince Yamashiro's house

Soga no Iruka's destruction of Prince Yamashiro's house was the 643 annihilation of Prince Yamashiro's family, ending the royal line of Shōtoku Taishi, at Ikaruga, Japan.

Soga no Kurayamada no Ishikawa no Maro

Soga no Kurayamada no Ishikawa no Maro (蘇我倉山田石川麻呂) was a Soga clan statesman who became the first udaijin under Emperor Kōtoku, dying by suicide in 649.

Soga no Umako

Soga no Umako (蘇我馬子) was head of the Soga clan and grand minister of the Yamato court, who destroyed the Mononobe in 587 and died in 626.

Soga Shōhaku's fantastic style

Soga Shōhaku's fantastic style is the idiosyncratic painting mode of Edo-period artist Soga Shōhaku (曾我蕭白, 1730–1781), who rendered traditional subjects with grotesque humor, brilliant colors, and supernatural realms.

Soga Sukenari

Soga Sukenari (曽我十郎祐成, 1172–1193) was a Japanese warrior who, with his brother Tokimune, killed their father's enemy Kudō Suketsune during Yoritomo's 1193 hunt at Mount Fuji.

Soga Tokimune

Soga Tokimune (曽我五郎時致, 1174–1193) was a Japanese samurai who avenged his father by killing Kudo Suketsune during Minamoto no Yoritomo's 1193 hunt at Mount Fuji.

Soga–Mononobe conflict

The Soga–Mononobe conflict was a sixth-century power struggle at the Yamato court between the Soga and Mononobe clans over Buddhism, imperial succession, and the direction of the state.

SOGA, coiled-coil domain

SOGA coiled-coil domain (Pfam PF11365, InterPro IPR027881 SOGA_CC): a conserved N-terminal coiled-coil domain of the SOGA family proteins SOGA1, SOGA2/MTCL1, and SOGA3, involved in autophagy regulation and mitotic chromosome segregation.

Sogak

Sogak (속악, common music) is the vernacular branch of Korean traditional music, opposed to ritual aak; in modern classification it means folk music like pansori and sanjo.

Sogamoso

Sogamoso, historically Suamox or Sugamuxi, is a city in Boyacá, Colombia, and the former religious capital of the Muisca, home to the Temple of the Sun.