As

• A. S. Byatt (born 1936), English critic, novelist, poet and short story writer
• Adult Swim, a programming block on Cartoon Network
• {{lang|sv|Akademiska Sångföreningen|italic=no}}, 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

• {{lang|cs|Akciová společnost (a.s.)|italic=no}}, a Czech form of joint-stock company
• {{lang|sk|Akciová spoločnosť (a.s.)|italic=no}}, a Slovak form of joint-stock company
• {{lang|da|Aktieselskab|italic=no}} or A/S, a type of Danish stock-based company
• {{lang|no|Aksjeselskap|italic=no}} or AS, a type of Norwegian stock-based company

• 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
• {{lang|fr|Armée secrète|italic=no}}, 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

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

• 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

• 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

• 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

• Arcsecond, {{frac|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

• 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

• {{lang|cs|Aš|italic=no}}, a town in the Czech Republic
• {{lang|no|Ås, Akershus|italic=no}}, Norway
• As, Belgium, in Limburg
• {{lang|no|Ås, Sør-Trøndelag|italic=no}}, Norway
• {{lang|sv|Ås|italic=no}}, Swedish name for the {{lang|fi|Harju|italic=no}} quarter in Helsinki, Finland
• As, Ukraine (formerly known as Proletarka), a village in Ukraine

• {{lang|fa-Latn|As-e Jadid|italic=no}} ({{lang|fa|اس جديد}}, "New As"), a village in East Azerbaijan Province, Iran
• {{lang|fa-Latn|As-e Qadim|italic=no}} ({{lang|fa|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

• {{lang|non|Æsir|italic=no}} (singular: {{lang|non|ás}}, {{lang|non|áss}}, {{lang|non|ǫ́ss}}), one of the pantheon of Norse gods
• {{Transliteration|ar|DIN|ʿAlayhi s-salām}} ({{lang|ar|عليه السلام}}), Arabic for "Peace be upon him", post-nominal posthumous Islamic honorific

• As (Roman coin), a coin and unit of weight
• A.S., {{lang|la|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

• Aas (surname)
• {{Look from}}
• {{In title}}

{{Disambiguation|geo}}