# As

As, AS, A. S., A/S or similar may refer to:

## Art, entertainment, and media

* A. S. Byatt (born 1936), English critic, novelist, poet and short story writer
* Adult Swim, a programming block on Cartoon Network
* Akademiska Sångföreningen, an academic male voice choir of Helsinki, Finland
* As (newspaper), a Spanish sports newspaper
* "As" (song), by Stevie Wonder
* As, a 1896 novel by Adolf Dygasiński
* As the Dog, a sculpture in Warsaw, Poland

## Business legal structures

* Akciová společnost (a.s.), a Czech form of joint-stock company
* Akciová spoločnosť (a.s.), a Slovak form of joint-stock company
* Aktieselskab or A/S, a type of Danish stock-based company
* Aksjeselskap or AS, a type of Norwegian stock-based company

## Businesses and organizations

* A.S. Roma, an Italian football club
* Alaska Airlines, IATA airline designator
* Armée secrète (Belgium), a World War II resistance organization
* KK AS Basket, a Serbian basketball club
* Armée secrète, a French resistance organization
* Athletics (baseball), an American baseball team referred to as the A's
* Australian Standards, a standards organisation established in 1922
* Voiturettes Automobiles A.S., a French-based car manufacturer in 1920s
** AS Type A2, a sports car manufactured by Voiturettes Automobiles A.S.
* Towarzystwo Budowy Samochodów AS, a Poland-based car manufacturer in 1920s and 1930s
** AS S1 and AS S2, a passenger car manufactured by Towarzystwo Budowy Samochodów AS

## Education and research

* Academia Sinica, the national academy of Taiwan
* AS-level (disambiguation), any of several uses in education
* Associate of Science, an American academic degree

## Language

* As language, a language of West Papua, Indonesia
* as, ISO 639-1 code for the Assamese language of India
* As (cuneiform), a written character
* Aš (cuneiform), a written character

## Mathematics, science and technology
### Computing

* as (Unix), an assembler program
* .as, the Internet country code top-level domain for American Samoa
* ActionScript, for Flash and Flex applications
* Autonomous system (Internet), a collection of IP networks
* Application server, a computer running back-end applications
* the type conversion operator as, used in C# and Rust

### Health and medicine

* Angelman syndrome, a neuro-genetic disorder
* Ankylosing spondylitis, a type of arthritis
* Aortic stenosis, a valvular heart disease
* Asparagine synthase (glutamine-hydrolysing), an enzyme
* Asperger syndrome, an autism spectrum disorder
* Auricular splint, a custom-made medical device used as part of ear surgery

### Units of measurement

* Arcsecond, 1⁄60 arcminute, a unit of angular measurement
* Attosecond or as, 10$^{−18}$ second, a subunit of time
* Attosiemens or aS, 10$^{−18}$ siemens, a subunit of electric conductance

### Other uses in mathematics and science

* Abramowitz and Stegun, a mathematical reference work
* Aggregate supply, in economics, the total supply of goods
* Almost surely or a.s., in probability theory
* Arsenic, symbol As, a chemical element
* As (beetle), a genus in family Cerylonidae
* Tropical savanna climate, labelled As or Aw

## Places
### Europe

* Aš, a town in the Czech Republic
* Ås, Akershus, Norway
* As, Belgium, in Limburg
* Ås, Sør-Trøndelag, Norway
* Ås, Swedish name for the Harju quarter in Helsinki, Finland
* As, Ukraine (formerly known as Proletarka), a village in Ukraine

### Other places

* As-e Jadid (اس جديد, "New As"), a village in East Azerbaijan Province, Iran
* As-e Qadim (اس قديم, "Old As"), a village in East Azerbaijan Province, Iran
* American Samoa (ISO 3166 code AS)
** .as, the Internet country code top-level domain for American Samoa
* Australia (obsolete NATO and FIPS country codes AS)
* Assam, a state of India

## Religion

* Æsir (singular: ás, áss, ǫ́ss), one of the pantheon of Norse gods
* ʿAlayhi s-salām (عليه السلام), Arabic for "Peace be upon him", post-nominal posthumous Islamic honorific

## Other uses

* As (Roman coin), a coin and unit of weight
* A.S., Anno Societatis, a calendrical system used in the Society for Creative Anachronism
* Anti-submarine warfare, A/S
* Amateurliga Saarland, highest football league in the state of Saarland (defunct)
* Old name for Ossetians, "As" or "Asi"
* A US Navy hull classification symbol: Submarine tender (AS)
* Altostratus, a cloud that is sometimes abbreviated as As.
* AS, Indonesian abbreviation for United States