Set

Set may refer to:

Mathematics

Set, to make/become solid: see Solidification
SET, Secure Electronic Transaction, a standard protocol for securing credit card transactions over insecure networks
SET, Single-Electron Transistor, a device to amplify currents in nanoelectronics
SET, single-ended triode, a type of electronic amplifier
SET Awards, The Science, Engineering & Technology Student of the Year Awards
Set (command), a command for manipulating environment variables in Unix and Microsoft operating-systems
Software Engineer in Test, a Quality Assurance job title in some software companies
Saw set, the process of setting the teeth of a saw so each tooth protrudes to the side of the blade

Theatrical scenery
Set construction, construction of scenery for theatrical, movie and video production

DJ set or DJ mix, a musical performance by a DJ
Set theory (music), dealing with concepts for categorizing musical objects and describing their relationships
Set (music), 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 list of songs to be performed at a concert

Set or Father Set, a fictional deity in the Conan adventure novels by Robert E. Howard and their Marvel Comics interpretation

Set and setting, coined by Timothy Leary to describe the mindset and location of hallucinogenic experiences
Seṭ and aniṭ roots, in Sanskrit grammar
Set (video game), a group of items that adds specific bonuses
Set (river), a river in northeastern Spain
Set or sett, a badger's den
Set, a small tuber or bulb used instead of seed, especially:
- Potato set
- Onion set

Sanlih Entertainment Television, a television channel in Taiwan
Scalar expectancy theory
Serial endosymbiosis theory, a theory concerning the origins of mitochondria and plastids
Senior Engineering Technician, NICET Level IV certification
Similarity Enhanced Transfer, a technology used to speed up download rate of files on file sharing networks
Simulated Emergency Test, an amateur radio training exercise
Single Embryo Transfer
Societatea Pentru Exploatări Tehnice, a Romanian aeronautics company of the 1920s to 1940s
Society of Engineering Technologists, a student organization at Texas Tech University
Sony Entertainment Television, a television channel owned by Sony
South Eastern Trains, a rail company operating in South East England
Stock Exchange of Thailand, the national stock exchange of Thailand
- SET Index, an index for the Stock Exchange of Thailand
Strategic Energy Technologies Plan (EU SET Plan)
Study of Exceptional Talent, a program for gifted students
Single-Ended Triode, a type of electronic amplifier
Social entropy Theory, application of entropy concept to maintenance or disorganisation in society
Northeastern University, School of Engineering Technology
Selective Employment Tax, a UK tax on non-productive workers introduced in 1966 and abandoned a few years later
Southeast Toyota Distributors LLC, a distributor of Toyota vehicles
Suzuki SET, Suzuki Exhaust Tuning, a device for altering pressure waves within motorcycle exhausts