ACP

ACP is a three-letter abbreviation with multiple meanings, as described below:

Acyl Carrier Protein, a fundamental protein in fatty acid and polyketide biosynthesis
Admin Control Panel, a panel on forums and websites for editing setup
Africa, Caribbean and Pacific, the countries that are signatories of the Cotonou Agreement
Airlines Control Program, an operating system developed by IBM for processing airline reservations and related data
Algebra of Communicating Processes, an algebraic approach to reasoning about concurrent systems
American College of Physicians, a national organization of doctors of internal medicine in the United States
Armenian Communist Party, a communist political party in Armenia
Array Control Processor
Associate Computing Professional, a certification offered by the Institute for the Certification of Computing Professionals
Associated Collegiate Press, a national membership organization for college student media in the United States
Association of Chess Professionals, and organisation to protect professional chess players' rights and promote the game of chess
Australian Consolidated Press, a major publisher of magazines in Australia
Automatic Cell Planning, a term used in mobile communications
Automatic Colt Pistol, an ammunition standard
Automovel Clube de Portugual, an automobile club in Portugal
Autoridad del Canal de Panamá (Panama Canal Authority), the authority in charge of the Panama Canal