unit of measurement for catalytic activity Acetyl-CoA C-acyltransferase, an enzyme Kearsarge Arts Theatre Company, a non-profit summer program for children interested in the arts KickassTorrents, also known as KAT, a BitTorrent search engine Kleene algebra with tests Team Katusha (ICU code KAT), a Russian bicycle racing team See also Kat O, an island in northeast Hong Kong territory De Kat (disambiguation) Cat (disambiguation) Kats (disambiguation) Khat, a plant Kät (disambiguation)