Editing As (section)

==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 <code>as</code>, used in [[C Sharp (programming language)|C#]] and [[Rust (programming language)|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, {{frac|1|60}} [[minute of arc|arcminute]], a unit of angular measurement
* [[Attosecond]] or as, 10<sup>−18</sup> second, a subunit of time
* [[Attosiemens]] or aS, 10<sup>−18</sup> 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''