• The abbreviation for the town of Castleford, West Yorkshire, UK
• CaS, the chemical formula of Calcium sulfide
• the standard astronomical abbreviation of Cassiopeia (constellation)
• Caş, a type of cheese made in Romania.
• Cas (people), an ancient people
• Cas Guava (Psidium friedrichsthalium), a species of guava that grows in Costa Rica, and has edible fruit with an acidic taste.
• Content-addressable storage
• Compare and swap, a special atomic instruction in computer architecture.
• Computer Algebra System, a software program that facilitates symbolic mathematics.
• Computer assisted surgery, surgical interventian that is guided and planned using computers

See also

• CAS