set

(astronomy) Of a celestial body, to cross the visible western horizon while descending.
(chemistry) The hardening or solidifying of a plastic or liquid substance.
(computer science) A collection of record types.
(electronics) The placement of a storage device in a prescribed state, for example, a binary storage cell in the high or 1 state.
(engineering) A combination of units, assemblies, and parts connected or otherwise used together to perform an operational function, such as a radar set. In plastics processing, the conversion of a liquid resin or adhesive into a solid state by curing or evaporation of solvent or suspending medium, or by gelling. Saw teeth bent out of the plane of the saw body, resulting in a wide cut in the workpiece.
(geology) A group of essentially conformable strata or cross-strata, separated from other sedimentary units by surfaces of erosion, nondeposition, or abrupt change in character.
(graphic arts) The fixing or drying of a printing ink on a printed sheet, so that, though not completely dry, the sheet can be handled without smudging.
(materials) The hardening or firmness displayed by some materials when left undisturbed. Permanent deformation of a material, such as metal or plastic, when stressed beyond the elastic limit.
(mathematics) A collection of objects which has the property that, given any thing, it can be determined whether or not the thing is in the collection.
(mechanics) permanent set
(mining engineering) frame set
(navigation) The establishment of a course.
(oceanography) The direction toward which an oceanic current flows.

(Secure Electronic Transaction) A standard protocol from MasterCard and Visa for securing online credit card payments via the Internet. It is a three-way transaction: the user, merchant and bank must use the SET protocols.

Credit card data and a digital certificate (for authentication) is stored in a plug-in to the user's Web browser. The order is received by a SET-enabled merchant server that passes encrypted payment information to the bank. Approval is electronically sent to the merchant.

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SET may stand for:

• Sanlih Entertainment Television, a television channel in Taiwan
• Secure electronic transaction, a protocol used for credit card processing,
• 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-Electron Transistor, a device to amplify currents in nanoelectronics,
• Society for the Eradication of Television,
• Sony Entertainment Television, a television channel owned by Sony,
• South Eastern Trains now run by Southeastern, a public-owned rail company operating in South East England,
• Stock Exchange of Thailand, a national stock exchange of Thailand,
• SET Index, an index for Stock Exchange of Thailand,
• Study of Exceptional Talent, a program for gifted students with high scores on the SAT in middle school,
• Single-Ended Triode, a type of electronic amplifier,
• Social Entropy Theory, application of entropy concept to maintenace or disorganisation in society,
• 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, the world's largest privately owned distributor of Toyota vehicles,
• Suzuki SET (Suzuki Exhaust Tuning).

SET may also refer to:

• The DOS command to set environment variables.

See also

• Set (disambiguation)

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