Act

Act, ACT, or The Act may refer to:

Arts and entertainment

 * A.C.T, a Swedish band
 * The Act (1989 film), a 1989 British television film by Richard Langridge
 * The Act, American rapper also known as UnoTheActivist
 * Act (band), a British band
 * The Act (band), a Norwegian rock band from the 1980s
 * Act (drama), a segment of a dramatic or musical work (such as a play, opera, or ballet)
 * The Act (musical), a 1977 musical
 * The Act (TV series), a 2019 true crime TV series
 * The Act (video game), a 2007 arcade game produced by Cecropia
 * ACT Music, a German music label
 * ACT Theatre, in Seattle, Washington, US
 * Acting, theatrical performance
 * Acts, a 2012 album by American band RNDM
 * American Conservatory Theater, in San Francisco, California, US
 * Arts & Culture Trust, a South African cultural organisation responsible for the ACT Awards

Business organizations

 * AdaCore, formerly Ada Core Technologies, Ada specialist software company
 * Advanced Cell Technology, stem cell company
 * Advanced Computer Techniques, a U.S. software company 1962–1994
 * Applied Computer Techniques, later Apricot Computers, UK
 * Atria Convergence Technologies, a telecommunications company in India
 * Aviation Composite Technology, an aircraft manufacturer in the Philippines

Education

 * ACT (nonprofit organization), provides assessments etc. for US school students etc.
 * ACT (test), for college admission, US
 * Asian College of Technology, Cebu City, Philippines
 * Australian College of Theology

Government / military

 * AC Transit, a transit agency serving Alameda and Contra Costa Counties, California
 * Advanced Clean Trucks Regulation, a rule made by the California Air Resources Board which requires trucks to decarbonize
 * Advanced Concepts Team, a research team of the European Space Agency
 * Agency for Community Transit, a paratransit system for Madison County Transit, Illinois
 * Allied Command Transformation, a NATO strategic command
 * Azienda comunale del traffico, a former transport operator in Lugano, Switzerland
 * Puerto Rico Highways and Transportation Authority (Autoridad de Carreteras y Transportación)

Law

 * Act (document), a document recording the legality of a transaction or contract
 * Acting (law) refers to someone temporarily exercising the powers of a vacant position
 * Act of Parliament, Act of Congress, or Act of Tynwald, a statute or law passed by a legislature
 * Advance corporation tax, a tax collected in the UK until 1999

Political parties and campaigning/advocacy groups

 * Act! (Italy), an Italian political party
 * ACT Alberta, a Canadian coalition to raise awareness about human trafficking
 * ACT Alliance, an alliance of churches for coordinating humanitarian assistance and development work
 * ACT New Zealand, a political party in New Zealand
 * ACT Teachers Partylist, a political party in the Philippines
 * ACT for America, an advocacy group in the United States
 * ACT-CIS Partylist, a political party in the Philippines
 * Action for Children's Television, an organization dedicated to improvements in children's television
 * Agir (France) (French for "Act"), a political party in France
 * Alliance for Change and Transparency, a political party in Tanzania
 * Amazon Conservation Team, a non-profit organization that works to protect the Amazon rainforest
 * America Coming Together, a US political group

Professional organizations

 * Academy of Clinical Thyroidologists, United States
 * Alliance of Concerned Teachers, Philippines
 * American College of Toxicology
 * Association for Citizenship Teaching, UK
 * Association of Cinematograph, Television and Allied Technicians, UK
 * Association of Corporate Treasurers, UK

Other organizations

 * ACT, former name of Together for Short Lives, a children's charity in the United Kingdom
 * Addenbrooke's Charitable Trust, a UK charity
 * Anglican Church in Thailand
 * The Association of Commercial Television in Europe, a group representing the business interests of commercial television in the EU
 * Australian Civic Trust, an Australian urban design organization

Sports

 * Australia national cricket team
 * American Canadian Tour, a stock car racing series

Transport

 * ACT, the IATA code for Waco Regional Airport, Texas, US
 * ACT, the National Rail code for Ascot railway station, Berkshire, UK

Computing

 * ACT (NASDAQ), Automated Confirmation of Transactions, a trade reporting and clearing system
 * Act! LLC, a customer relationship management software
 * ACT-R, a symbolic cognitive architecture
 * Apple Certified Trainer, one of the Apple certification programs

Medicine

 * Acceptance and commitment therapy, a type of cognitive-behavioral therapy
 * Acetylcholine, (ACt/ACh) a neurotransmitter
 * Activated clotting time, a test of coagulation
 * Adoptive cell transfer, transfer of cells into a patient, usually immune system cells
 * Artemisinin based combination therapy, a treatment for malaria
 * Assertive community treatment, a system for treating mental illness

Other uses in science, technology, and mathematics

 * Act or S-act, the action of a monoid on a set, or a semiautomaton
 * ACT (audio format), a file format
 * Ford ACT, a transit system
 * Astrographic Catalog/Tycho or Tycho-2 Catalogue
 * Atacama Cosmology Telescope, Chile
 * ACT, a codon for the amino acid Threonine

Other uses

 * , in linguistics, glossing abbreviation for active voice
 * ACT, the ISO 639-3 language code for Achterhooks, a Dutch dialect
 * ACT mouthwash, produced by Chattem
 * Acting rank, temporary military rank
 * Australian Capital Territory ("The ACT"), the territory in which the Australian capital city of Canberra is seated
 * Courtney Act, Australian drag queen, singer, and television personality