Acat or ACAT may refer to:
Military "Avoid, Control, Accept, or Transfer", a catchphrase used in Risk Management as taught in the US Department of Defense Acquisition Category, a term from the US Department of Defense Instruction 5000.02 - Operation of the Defense Acquisition System; see Glossary of military modeling and simulation
Science Acetyl-coenzyme A acetyltransferase, an enzyme Acyl-CoA:cholesterol acyltransferase, an intracellular protein involved in cholesterol metabolism ACAT1 mRNA, a messenger RNA molecule
Psychotherapy Association for Cognitive Analytic Therapy in the UK International Cognitive Analytic Therapy Association CAT Scotland
Other uses Acat (deity), a Mayan god of tattooing ACT Civil and Administrative Tribunal, Australian Capital Territory Asociación Continental Americana de Trabajadores, a Latin American trade union federation International A-class catamaran ("A-Cat"), a type of sailing craft Alberta Council on Admissions and Transfer, an educational organization Automated Customer Account Transfer Service, a financial securities transfer system Assistive context-aware toolkit, the open-source input method used by Stephen Hawking