Editing CAS (section)

==Science and medicine==
* [[Calcium sulfide]] (CaS), a chemical compound
* [[Coronary artery spasm]] (CAS)
* [[Carotid stenting|Carotid artery stenting]], endovascular surgery of the carotid artery 
* [[Cassiopeia (constellation)]] (Cas), standard astronomical abbreviation
* [[Cells Alive System]]
* [[Chemical Abstracts Service]], a division of the American Chemical Society which produces bibliographic and chemistry databases
** [[CAS Registry Number]], unique numerical identifiers for chemical substances
* [[Cognitive Assessment System]], an academic assessment test given to children
* [[Complex adaptive system]], special cases of complex systems
* [[Computer Aided Surgery (journal)|''Computer Aided Surgery'' (journal)]]
* [[Computer-assisted surgery]], use computer technology in surgery
* [[Critical animal studies]], an interdisciplinary field in the humanities and social sciences
* [[Critical autism studies]]
* [[Hartley transform|Hartley kernel]], which also is known as the ''cosine and sine'' function
* [[Cis-abienol synthase]], an enzyme
* [[CRISPR]]-associated (Cas) proteins, involved in the prokaryotic immune system and genome editing
* [[CAS parameters]], an image analysis method typically used in astronomy
* [[Childhood apraxia of speech]], a developmental speech disorder