company Government ACE Electoral Knowledge Network, a web portal Agriculture in Concert with the Environment, a US Environmental Protection Agency program American Clean Energy and Security Act (2009) Automation of Central Excise and Service Tax (ACES), an alternative name for India's Central Excise Mission Mode Project Military Ace (military) Flying ace, a military aviator credited with shooting down a set number of enemy aircraft Panzer ace, an ahistorical, popular culture term to describe successful German tank commanders Allied Command Europe, central command of NATO forces in Europe Aviation combat element, the air arm of the US Marines Air-Ground Task Force Galil ACE, an assault rifle HMS Ace (P414), a British submarine M9 Armored Combat Earthmover, a tracked vehicle United States Army Corps of Engineers Organisations Alliance for Creativity and Entertainment Alliance of Confessing Evangelicals Alternatives for Community and Environment, a Boston environmental justice organization American Cinema Editors American Coaster Enthusiasts American College of Epidemiology American Copy Editors Society American Council on Education Animal Charity Evaluators Anime Contents Expo, a trade fair Arts Council England Association for Comparative Economic Studies Association for Consciousness Exploration Association for Consultancy and Engineering Association of European Film Archives and Cinematheques (French: Association des Cinémathèques Européennes) Association of Latin Entertainment Critics (Spanish: Asociación de Cronistas de Espectáculos de Nueva York) Assyria Council of Europe, a lobbying organization based in Brussels Astronaute Club Européen, a French space tourism association Australian College of Educators Auxiliary Campus Enterprises and Services, an organization at Alfred College, US Education Alternative Center for Excellence, a school in Danbury, Connecticut, US Aviation Centre of Excellence, a department of Confederation College in Thunder Bay, Ontario, Canada Science and technology Aerospace Advanced Cryogenic Evolved Stage, a proposed rocket 2nd stage for ULA Advanced Composition Explorer, a NASA satellite Advanced Crew Escape Suit, an astronaut suit Atomic Clock Ensemble in Space, a European Space Agency project Atmospheric Chemistry Experiment, a project of the Canadian satellite SCISAT-1 Asia Cellular Satellite system, a precursor of the Indonesian satellite company PT Pasifik Satelit Nusantara Biology, chemistry, and healthcare A.C.E. mixture, an historical anesthetic Angiotensin-converting enzyme, a central component of the renin–angiotensin system (RAS), which controls blood pressure ACE inhibitor, a drug that lowers blood pressure Ace K, acesulfame potassium, an artificial sweetener ACE unit (Acute Care of Elderly), a type of hospital facility Acepromazine, an antipsychotic drug used primarily in animals ACES (buffer), one of Good's buffers ACES (nutritional