Set, The Set, SET or SETS may refer to:

Science, technology, and mathematics

Mathematics

Set (mathematics) In mathematics, a set is a collection of different things; the things are '' elements'' or ''members'' of the set and are typically mathematical objects: numbers, symbols, points in space, lines, other geometric shapes, variables, or other se ...

, a collection of elements *

Category of sets In the mathematical field of category theory, the category of sets, denoted by Set, is the category whose objects are sets. The arrows or morphisms between sets ''A'' and ''B'' are the functions from ''A'' to ''B'', and the composition of mor ...

, the category whose objects and morphisms are sets and total functions, respectively

Electronics and computing

Set (abstract data type) In computer science, a set is an abstract data type that can store unique values, without any particular sequence, order. It is a computer implementation of the mathematics, mathematical concept of a finite set. Unlike most other collection (abstr ...

, a data type in computer science that is a collection of unique values **

Set (C++) In C++, associative containers are a group of class templates in the standard library of the C++ programming language that implement ordered associative arrays. Being templates, they can be used to store arbitrary elements, such as integers or ...

, a set implementation in the C++ Standard Library *

Set (command) This article lists notable commands provided by the MS-DOS disk operating system (DOS), especially as used on an IBM PC compatible computer. Other DOS variants as well as the legacy Windows shell, Command Prompt (cmd.exe), provide many of these c ...

, a command for setting values of environment variables in Unix and Microsoft operating-systems *

Secure Electronic Transaction Secure Electronic Transaction (SET) is a communications protocol standard for securing credit card transactions over networks, specifically, the Internet. SET was not itself a payment system, but rather a set of security protocols and formats that ...

, a standard protocol for securing credit card transactions over insecure networks *

Single-electron transistor A single-electron transistor (SET) is a sensitive electronic device based on the Coulomb blockade effect. In this device the electrons flow through a tunnel junction between source/drain to a quantum dot (conductive island). Moreover, the electric ...

, a device to amplify currents in nanoelectronics *

Single-ended triode A single-ended triode (SET) is a vacuum tube electronic amplifier that uses a single triode to produce an output, in contrast to a push-pull amplifier which uses a pair of devices with antiphase inputs to generate an output with the wanted sign ...

, a type of electronic amplifier *

Set! Scheme is a dialect of the Lisp family of programming languages. Scheme was created during the 1970s at the MIT Computer Science and Artificial Intelligence Laboratory (MIT CSAIL) and released by its developers, Guy L. Steele and Gerald Jay Sus ...

, a programming syntax in the scheme programming language

Biology and psychology

Set (psychology) In psychology, a set is a group of expectations that shape experience by making people especially sensitive to specific kinds of information. A ''perceptual set'', also called ''perceptual expectancy'', is a predisposition to perceive things in a ...

, a set of expectations which shapes perception or thought *Set or

sett A sett or set is a badger's den. It usually consists of a network of tunnels and numerous entrances. The largest setts are spacious enough to accommodate 15 or more animals with up to of tunnels and as many as 40 openings. Such elaborate setts ...

, a badger's den *Set, a small tuber or bulb used instead of seed, especially: **

Potato The potato () is a starchy tuberous vegetable native to the Americas that is consumed as a staple food in many parts of the world. Potatoes are underground stem tubers of the plant ''Solanum tuberosum'', a perennial in the nightshade famil ...

set **

Onion An onion (''Allium cepa'' , from Latin ), also known as the bulb onion or common onion, is a vegetable that is the most widely cultivated species of the genus '' Allium''. The shallot is a botanical variety of the onion which was classifie ...

set *

SET (gene) Protein SET, also known as Protein SET 1, is a protein that in humans is encoded by the ''SET'' gene. Interactions Protein SET has been shown to interact with: * Acidic leucine-rich nuclear phosphoprotein 32 family member A, * CDK5R1, * ...

, gene for a human protein involved in apoptosis, transcription and nucleosome assembly * Single

Embryo Transfer Embryo transfer refers to a step in the process of assisted reproduction in which embryos are placed into the uterus of a female with the intent to establish a pregnancy. This technique - which is often used in connection with in vitro fertili ...

, used in ''in vitro'' fertilization

Physics and chemistry

* A chemical change in an

adhesive Adhesive, also known as glue, cement, mucilage, or paste, is any non-metallic substance applied to one or both surfaces of two separate items that binds them together and resists their separation. The use of adhesives offers certain advantage ...

from unbonded to bonded ** Set, to make/become solid; see

Solidification Freezing is a phase transition in which a liquid turns into a solid when its temperature is lowered below its freezing point. For most substances, the melting and freezing points are the same temperature; however, certain substances possess dif ...

Stress–energy tensor The stress–energy tensor, sometimes called the stress–energy–momentum tensor or the energy–momentum tensor, is a tensor physical quantity that describes the density and flux of energy and momentum in spacetime, generalizing the stress ...

, a physical quantity in the theory of fields *

Single electron transfer In chemistry, a radical, also known as a free radical, is an atom, molecule, or ion that has at least one unpaired valence electron. With some exceptions, these unpaired electrons make radicals highly chemically reactive. Many radicals spont ...

Other uses in science and technology

Saw set A saw set is a tool or part of the tool kit for tuning saw blades. It adjusts the ''set'', or distance the saw tooth is bent away from the saw blade. The magnitude of set determines the cut width and prevents the blade of the saw from binding in ...

, the process of setting the teeth of a saw so each tooth protrudes to the side of the blade *

Scalar expectancy The scalar timing or scalar expectancy theory (SET) is a model of the processes that govern behavior controlled by time. The model posits an internal clock, and particular memory and decision processes. SET is one of the most important models of an ...

theory, a model of the processes that govern behavior controlled by time * Science, Engineering & Technology, e.g.

The Science, Engineering & Technology Student of the Year Awards The Science, Engineering & Technology Student of the Year Awards (SET Awards) were presented to outstanding undergraduate students in the United Kingdom yearly between 1998 and 2013. The award was open to students who were on a first-degree course a ...

Setting (typesetting) Typesetting is the composition of text for publication, display, or distribution by means of arranging physical ''type'' (or ''sort'') in mechanical systems or ''glyphs'' in digital systems representing '' characters'' (letters and other ...

, the act of typesetting a publication for print or display *

Simulated Emergency Test The annual Simulated Emergency Test (SET) is a training exercise involving the Amateur Radio Emergency Service (ARES) and the National Traffic System (NTS), a message-handling service of amateur radio. The American Radio Relay League is a prime ...

, an amateur radio training exercise * Software Engineer in Test, a

Quality Assurance Quality assurance (QA) is the term used in both manufacturing and service industries to describe the systematic efforts taken to assure that the product(s) delivered to customer(s) meet with the contractual and other agreed upon performance, design ...

job title in some software companies *

Strategic Energy Technologies The energy policy of the European Union focuses on energy security, Sustainable energy, sustainability, and integrating the energy markets of member states. An increasingly important part of it is climate policy. A key energy policy adopted in ...

Plan of the European Union *

Suzuki SET A four-stroke power valve is a device fitted to four-stroke engines that constantly adjusts the internal diameter of the exhaust system to better suit the speed of the engine. Yamaha was the first to develop such a system, called the Exhaust Ulti ...

, Suzuki Exhaust Tuning of motorcycles *

Set Catena Set Catena is a pit chain (''catena'') and likely tectonic fault located on Triton, the largest natural satellite of Neptune. It, along with Kraken Catena, is located near Leviathan Patera, a major cryovolcanic feature; as such, Set Catena ...

, a pit chain on Neptune's largest moon Triton

Arts and entertainment

Comics and literature

Set (comics) S'Byll S'Byll (sometimes spelled S'byll) is a character appearing in American comic books published by Marvel Comics. S'Byll is a Skrull that was raised on the planet Satriani. She was responsible for curing Super-Skrull of his disease. ...

, the chief deity of the Stygian people in Robert E. Howard's stories of ''Conan the Barbarian'' and the later Marvel comics series

Dance

*Set, the basic square formation in

square dancing A square dance is a dance for four couples, or eight dancers in total, arranged in a square, with one couple on each side, facing the middle of the square. Square dances are part of a broad spectrum of dances known by various names: country dan ...

*Set, the basic longwise, square or triangular formation in

Scottish Country dancing Scottish country dance (SCD) is the distinctively Scottish form of country dance, itself a form of social dance involving groups of couples of dancers tracing Formation dance, progressive patterns. A dance consists of a sequence of figures. T ...

*Set, the basic formation of more than one couple in Scottish, English and Irish Céilidh

Film, television and theatre

Set (film and TV scenery) A set is artificially constructed scenery used in film and television. In the last two cases there are many reasons to build or use a set instead of travelling to a real location, such as budget, time, the need to control the environment, or the ...

Theatrical scenery Theatrical scenery is that which is used as a setting for a theatrical production. Scenery may be just about anything, from a single chair to an elaborately re-created street, no matter how large or how small, whether the item was custom-made or ...

Set construction Set construction is the process undertaken by a construction manager to build full-scale scenery, as specified by a production designer or art director working in collaboration with the director of a production to create a set for a theatr ...

, construction of scenery for theatrical, movie, television production, and video game production * ''The Set'' (film), a 1970 Australian movie * ''The Set'' (TV series), an Australian music television show * Sanlih Entertainment Television, a television channel in Taiwan *

Sony Entertainment Television Sony Entertainment Television (abbreviated as SET) is an Indian Hindi-language general entertainment pay television channel that was launched in 1995 and is owned by Culver Max Entertainment, a division of Sony Pictures. History This chann ...

, a Hindi-language television channel

Music

*DJ set or

DJ mix A DJ mix or DJ mixset is a sequence of musical tracks typically beatmixing, mixed together by a Disc jockey, DJ to appear as one continuous track. DJ mixes are usually performed using a DJ mixer and multiple sounds sources, such as Phonograph, tur ...

, a musical performance by a DJ *

Set theory (music) Musical set theory provides concepts for categorizing musical objects and describing their relationships. Howard Hanson first elaborated many of the concepts for analyzing tonal music. Other theorists, such as Allen Forte, further developed th ...

, dealing with concepts for categorizing musical objects and describing their relationships *

Set (music) A set (pitch set, pitch-class set, set class, set form, set genus, pitch collection) in music theory, as in Set (mathematics), mathematics and general parlance, is a collection of objects. In Set theory (music), musical contexts the term is trad ...

, a collection of discrete entities, for example pitch sets, duration sets, and timbre sets * ''Set'' (Thompson Twins album) * ''Set'' (Alex Chilton album) *

Set list A set list, or setlist, is typically a handwritten or printed document created as an ordered list of songs, jokes, stories and other elements an artist intends to present during a specific performance. A setlist can be made of nearly any materi ...

, a list of songs to be played during musical performances *"Set", a song from King Gizzard & the Lizard Wizard's 2023 album ''The Silver Cord''

Businesses and organizations

* Societatea Pentru Exploatări Tehnice, a Romanian aeronautics company of the 1920s to 1940s *

South Eastern Trains South Eastern Trains (stylised as Southeastern) was a publicly owned train operating company that operated the South Eastern Passenger Rail Franchise between November 2003, when it took over from Connex South Eastern, and 1 April 2006, whe ...

, former train operator England *

Stock Exchange of Thailand The Stock Exchange of Thailand (, ; SET) has been the sole stock exchange operator in Thailand since its establishment on 30 April 1975. As of 8 April 2025, with a market capitalization of US$380.19 billion (excluding mai) at an exchange rate ...

, the national stock exchange of Thailand * SET Index, an index for the Stock Exchange of Thailand * South Eastern Trust, Northern Irish health organization * Study of Exceptional Talent, a program for gifted students * Sydney Electric Train Society, an electric train preservation society in Sydney, Australia

Religion

Set (deity) Set (; Egyptian language#Egyptological pronunciation, Egyptological: ''Sutekh - swtẖ ~ stẖ'' or: Seth ) is a deity, god of deserts, storms, disorder, violence, and foreigners in ancient Egyptian religion. In Ancient Greek, the god's name is ...

or Seth, an ancient Egyptian deity *Set or

Seth Seth, in the Abrahamic religions, was the third son of Adam and Eve. The Hebrew Bible names two of his siblings (although it also states that he had others): his brothers Cain and Abel. According to , Seth was born after Abel's murder by Cain, ...

, a Biblical character, a son of Adam and Eve

Sport and games

Set (darts) A set in darts consists of a sequence of legs (games) played, ending when the count of legs won meets certain criteria. Throwing first is considered an advantage in a leg, so players alternate who throws first in each leg during the set. Genera ...

, a sequence of games *

Set (card game) ''Set'' (stylized as SET or SET!) is a real-time card game designed by Marsha Falco in 1974 and published by Set Enterprises in 1991. The Deck of cards, deck consists of 81 unique cards that vary in four features across three possibilities for ...

Set (cards) In card games, a set or group is a scoring combination consisting of multiple playing cards, usually of the same rank.Parlett (2008) p. 489. Depending on the game, a set may consist of two cards of equal rank (a "pair") as in Bieten, three of a ...

, two or more cards of the same rank ** Three of a kind (poker), a type of poker hand *

Set (dominoes) The following is a glossary of terms used in dominoes. Besides the terms listed here, there are numerous regional or local slang terms. Terms in this glossary should not be game-specific, i.e. specific to one particular version of dominoes, but ap ...

, the first play in dominoes *Set, a signal used in

American football American football, referred to simply as football in the United States and Canada and also known as gridiron football, is a team sport played by two teams of eleven players on a rectangular American football field, field with goalposts at e ...

*The set, a

pitching position In baseball, there are two legal pitch (baseball), pitching positions: the windup, and the set. Colloquially, the set is often referred to as "the stretch", although this term actually only refers to one part of the pitching motion when pitching fr ...

in baseball *Set, a unit of play in

tennis Tennis is a List of racket sports, racket sport that is played either individually against a single opponent (singles (tennis), singles) or between two teams of two players each (doubles (tennis), doubles). Each player uses a tennis racket st ...

*Set, a team's second contact with the ball in

volleyball Volleyball is a team sport in which two teams of six players are separated by a net. Each team tries to score points by grounding a ball on the other team's court under organized rules. It has been a part of the official program of the Summ ...

*Set, a group of repetitions in

weight training Strength training, also known as weight training or resistance training, is exercise designed to improve physical strength. It is often associated with the lifting of weights. It can also incorporate techniques such as bodyweight exercises ( ...

* Set (video game), a group of items that adds specific bonuses

Other uses

Set and setting Set and setting, when referring to a psychedelic drug experience or the use of other psychoactive substances, means one's mindset (shortened to "set") and the physical and social environment (the "setting") in which the user has the experience ...

, coined by Timothy Leary to describe the mindset and location of hallucinogenic experiences * Seṭ and aniṭ roots, in Sanskrit grammar * Set (river), a river in northeastern Spain *

Selective Employment Tax Selective Employment Tax (SET) was a weekly payroll tax in the United Kingdom. It was levied against employers at a flat rate of per man, and per woman. SET was intended to subsidise manufacturing industry from the proceeds of the services ind ...

, a tax in the United Kingdom from 1966 to 1973 *

Senate Electoral Tribunal The Senate Electoral Tribunal (SET) is an electoral tribunal that decides election protests in the Senate of the Philippines. It consists of 6 senators nominated by the Senate, and 3 justices of the Supreme Court of the Philippines, who are desig ...

, decides election protests for the Senate of the Philippines *A set, set meal, set menu, or

table d'hôte In restaurant terminology, a ''table d'hôte'' (; ) menu is a menu where multi-Course (meal), course meals with only a few choices are charged at a fixed total price. Such a menu may be called ''prix fixe'' ( ; "fixed price"). The terms set meal ...

: a meal offered at a fixed price *

Set (gang) In gang terminology, a set refers to a subgroup within a larger gang alliance. Sets vary in size and internal structure, and different sets within the same gang are known to fight one another. Structure and activities A large gang alliance, suc ...

, a subgroup of a gang alliance