AS

AS or as may refer to:

Science and technology

A. S. (car), a small French car built in the 1920s
ActionScript, a programming language developed by Macromedia and Adobe
Aggregate supply, the total supply of goods, in economics
Almost surely or a.s., in probability theory, an event with probability 1
Associate of Science, an American associate degree
Arsenic, chemical symbol "As"
Australian Standard, usually followed by the standard number
Autonomous system (Internet), a collection of IP networks
Arcsecond, ¹⁄₆₀ arcminute, a unit of angular measurement
Attosecond or as, one trillionth (long scale) (10⁻¹⁸) or one quintillionth (short scale) (10⁻¹⁸) of a second, a unit of time
Attosiemens or aS, one trillionth (long scale) (10⁻¹⁸) or one quintillionth (short scale) (10⁻¹⁸) of a siemens, a unit of electric conductance

.as, the Internet country code top-level domain for American Samoa
As, Belgium, a municipality in Belgium
Ås, a municipality in Akershus county, Norway
Ås, Sør-Trøndelag, a village in Tydal municipality in Sør-Trøndelag county, Norway
Ås, Swedish name for Harju quarter in Helsinki, Finland
Aš, a town in the Czech Republic

Aksjeselskap or A/S, a type of Norwegian stock-based company
Aktieselskab or A/S, a type of Danish stock-based company
Aktsiaselts, a type of Estonian stock-based company
Abilene and Southern Railway
Akademiska Sångföreningen or The Academic Male Voice Choir of Helsinki, a Finnish choir
Alaska Airlines, IATA airline designator
A.S. Roma, Italian football club based in Rome
Australian Standards
Diario AS, a Spanish sports newspaper

As (Roman coin), a coin and weight unit
"As" (song), a song by Stevie Wonder
Anglo-Saxon, ancestor of modern English language
Anti-submarine warfare
Assamese language, ISO 639 alpha-2 language code
Adult Swim, an adult-oriented block of programming on Cartoon Network
AS Level, a qualification in the United Kingdom; half an A Level
Anabolic Steroids, AS is an abbreviation often used on online bodybuilding forums