ACA may refer to:

Arts and entertainment

* ''A Current Affair'' (Australian TV series), an Australian television program *

Actors Centre Australia Actors Centre Australia is a private, dramatic arts and acting school offering both certificate and degree level qualifications, based in Leichhardt, an Inner West suburb of Sydney, in New South Wales, Australia. History ACA was founded in 1987 ...

, a private dramatic arts school *

American Choreography Awards The American Choreography Awards was a ceremony and show that honored outstanding choreographers in the fields of feature film, television, music videos, and commercials. They were first known as the L.A. Dance Awards (1994–95), then as Bob Fo ...

American Composers Alliance The American Composers Alliance (ACA) is an American nonprofit composer service organization dedicated to the publishing and promoting of American contemporary classical music. Founded in 1937 by Aaron Copland, Milton Adolphus, Marion Bauer and oth ...

American Council for the Arts Americans for the Arts is a nonprofit organization whose primary focus is advancing the arts in the United States. With offices in Washington, D.C., and New York City, with more than 50 years of service. Americans for the Arts is dedicated to repr ...

, now part of Americans for the Arts *

American Country Awards The American Country Awards (ACA) was an annual country music awards show, entirely voted on by fans online. Created in 2010 by Fox, the awards honor country music artists for singles, albums, music videos and touring categories. In 2012, "Song o ...

* A.C.E (South Korean band)

Business

* Alerting Communicators of America, an earlier name of

American Signal Corporation American Signal Corporation (ASC) is an outdoor warning siren and mass notification company in the United States. ASC was founded in 1942 as Biersach and Niedermeyer (B&N). After performing poorly, the company reformed as The Alerting Communi ...

* Angel Capital Association *

Astronautics Corporation of America Astronautics Corporation of America (ACA) was established in 1959 and is a US supplier, designer, and manufacturer of avionics equipment to airlines, governments, commercial and defense aircraft manufacturers, and other avionics systems integrator ...

Australian Coal Association The Australian Coal Association (ACA) is the major Australian coal mining industry lobby group. It represents the black coal producers of New South Wales and Queensland and consists of a number of relatively small coal mining companies or subsidi ...

Government and politics

Affordable Care Act The Affordable Care Act (ACA), formally known as the Patient Protection and Affordable Care Act and colloquially known as Obamacare, is a landmark U.S. federal statute enacted by the 111th United States Congress and signed into law by Presid ...

, shorthand for the Patient Protection and Affordable Care Act, commonly called "Obamacare" *

Allied Commission Following the termination of hostilities in World War II, the Allies were in control of the defeated Axis countries. Anticipating the defeat of Germany and Japan, they had already set up the European Advisory Commission and a proposed Far Easter ...

for Austria *

Anti-Corruption Agency An anti-corruption agency is a special police agency specialised in fighting political corruption and engaging in general anti-corruption activities. Most are founded by statute, but some have a constitutional status. List See also * * * ...

, a Malaysian government agency *

* Australian Communications Authority Historical *

Army Comrades Association The Army Comrades Association (ACA), later the National Guard, then Young Ireland and finally League of Youth, but best known by the nickname the Blueshirts ( ga, Na Léinte Gorma), was a paramilitary organisation in the Irish Free State, founded ...

, or "Blueshirts", a political organization in 1930s Ireland * Armed Peasant Association (Spanish: ), also known as Armed Campesino Group, a Marxist–Leninist Paraguayan rebel group

Organizations

Academic Cooperation Association The Academic Cooperation Association (ACA) is an international think tank in the area of international cooperation in higher education. Since 1993, ACA has worked to promote innovation and internationalisation of European higher education in colla ...

, international body to promote cooperation in higher education, based in Brussels *

Adult Children of Alcoholics Adult Children of Alcoholics (ACA or ACOA) founded circa 1973 is a fellowship of people who desire to recover from the effects of growing up in an alcoholic or otherwise dysfunctional family. ACA membership has few formal requirements. ACA does not ...

, counseling and support group *

Aero Club of America The Aero Club of America was a social club formed in 1905 by Charles Jasper Glidden and Augustus Post, among others, to promote aviation in America. It was the parent organization of numerous state chapters, the first being the Aero Club of New E ...

, US aviation group, now the National Aeronautic Association * American Cadet Alliance, former non-government group for military cadet activities *

American Chess Association The American Chess Association (ACA) was a chess organization founded in New York City in 1857. The organization organized the first major chess tournament, the First American Chess Congress, in the United States on October 6, 1857. On November 11, ...

, chess organization founded in 1857 and dissolved a few years later *

American Citizens Abroad American Citizens Abroad (ACA) is a 501(c)(4) organization, organized as a Delaware corporation. Its sister organizationAmerican Citizens Abroad Global Foundation (ACAGF) is a 501(c)(3) organization. Together, referred to as ACA, it is a leading rep ...

, non-profit group advocating for American expatriates *

American Cryptogram Association The American Cryptogram Association (ACA) is an American non-profit organization devoted to the hobby of cryptography, with an emphasis on types of codes, ciphers, and cryptograms that can be solved either with pencil and paper, or with computers, ...

, group for cryptographic puzzles *

American Crystallographic Association The American Crystallographic Association, Inc. (ACA) is a non-profit, scientific organization for scientists who study the structure of matter via crystallographic methodologies. Since its founding in 1949 it has amassed over 2000 members worldwi ...

, scientific society *

Amputee Coalition of America The Amputee Coalition is an American nonprofit organization based in Washington, D.C. The Amputee Coalition's mission is to reach out to and empower people affected by limb loss to achieve their full potential through education, support and adv ...

, advocacy and support group * ''

Analytica Chimica Acta ''Analytica Chimica Acta'' is a peer-reviewed scientific journal published since 1947 that covers original research and reviews of fundamental and applied aspects of analytical chemistry. See also * List of scientific journals in chemistry * An ...

'', scientific journal *

Anti-Communist Action Anti-Communist Action, also known as Anticom for short, is a right-wing to far-right organization based in the United States and Canada. The group has described itself as " the right's response to antifa." Anticom has espoused neo-Nazi ideol ...

, a far-right organization **

NSC-131 Nationalist Social Club-131 or NSC-131 is a neo-Nazi organization; the letters 131 stand for ACA or "Anti-Communist Action". It was founded in 2019 in eastern Massachusetts by Chris Hood, who had previously tried other neo-fascist groups such as Pat ...

, a neo-Nazi group *

Anglican Church in America The Anglican Church in America (ACA) is a Continuing Anglican church body and the United States branch of the Traditional Anglican Communion (TAC). The ACA, which is separate from The Episcopal Church, is not a member of the Anglican Communion ...

, traditionalist Anglican church body * Army Comrades Association ("

Blueshirts The Army Comrades Association (ACA), later the National Guard, then Young Ireland and finally League of Youth, but best known by the nickname the Blueshirts ( ga, Na Léinte Gorma), was a paramilitary organisation in the Irish Free State, founded ...

"), Irish militant right-wing group in 1932-1933 *

Association of Canadian Archivists The Association of Canadian Archivists (ACA), established in 1975, is a national not-for-profit organization representing over 600 archivists (and those interested in archives and archivists) in Canada. With headquarters in Ottawa, the ACA's mandat ...

, professional group for Canadian historical archivists * Atheist Community of Austin, Texas non-profit group which produces ''

The Atheist Experience "The Atheist Experience" is an American live, weekly televised webcast based in Austin, Texas. Listeners are encouraged to call in to discuss the existence of God and related topics. Calls from theists are usually given priority, as the aim of t ...

'' TV program * ''

Automóvil Club Argentino The Argentine Automobile Club ( es, Automóvil Club Argentino, ACA) is Argentina's largest automobile association. It was founded on June 11, 1904, by Dalmiro Varela Castex, who in 1892 had imported the country's first registered automobile, a D ...

'', Argentina's largest automobile association

Professional associations

* ACA International, formerly the American Collectors Association *

American Callers Association The American Callers Association (ACA) is the second largest association of square dance callers in the United States. ACA is a non-profit organization with headquarters at Muscle Shoals, Alabama. ACA has members in the United States, Canada, ...

, association of square dance callers *

American Camp Association The American Camp Association (ACA), formerly known as the American Camping Association, is a 501(c)(3) nonprofit that serves the United States. It is an association for camp owners, camp professionals and others interested in summer camps and ...

, professional and trade association for summer (and similar) camp owners and workers *

American Chiropractic Association The American Chiropractic Association (ACA), based in Arlington, Virginia, represents doctors of chiropractic. Its mission is to inspire and empower its members to elevate the health and wellness of their communities. Purpose and mission The m ...

, professional association *

Australian Counselling Association The Australian Counselling Association (ACA) is a non-profit, professional organisation that is dedicated to the counselling profession. ACA represents over 11,000 Registered Counsellors and Psychotherapists in Australia. ACA is the largest peak ...

, professional association *

American Counseling Association The American Counseling Association (ACA) is a membership organization representing licensed professional counselors (LPCs), counseling students, and other counseling professionals in the United States. It is the world's largest association exclus ...

, professional association *

American Correctional Association The American Correctional Association (ACA; called the National Prison Association before 1954) is a private, non-profit, non-governmental trade association and accrediting body for the corrections industry, the oldest and largest such associati ...

, professional and trade association for prisons and prison officials and employees *

Australasian Corrosion Association The Australasian Corrosion Association (ACA) is a non-profit membership association, headquartered in the state of Victoria, Australia and active in the Australasian region (mainly Australia and New Zealand), which disseminates information on cor ...

, Australia and New Zealand trade association *

Austrian Cockpit Association The Austrian Cockpit Association (ACA) is a professional pilot organization. ACA is the national member of IFALPA and ECA representing Austrian professional pilots. Main objective is the continuous improvement of aviation safety and security. De ...

, professional pilot organization * American College of Apothecaries, professional and trade association for independent community pharmacists

School

, international group promoting cooperation in higher education, based in Brussels * Asunción Christian Academy, an American school in Paraguay

Science and technology

7-ACA 7-ACA (7-aminocephalosporanic acid) is the core chemical structure (a synthon) for the synthesis of cephalosporin antibiotics and intermediates. It can be obtained by chemoenzymatic hydrolysis of cephalosporin C. See also * 6-APA 6-APA ((+)- ...

, 7-aminocephalosporanic acid * ACA, a

codon The genetic code is the set of rules used by living cells to translate information encoded within genetic material ( DNA or RNA sequences of nucleotide triplets, or codons) into proteins. Translation is accomplished by the ribosome, which links ...

for the amino acid

threonine Threonine (symbol Thr or T) is an amino acid that is used in the biosynthesis of proteins. It contains an α-amino group (which is in the protonated −NH form under biological conditions), a carboxyl group (which is in the deprotonated −COO� ...

Advisory Committee for Aeronautics The Advisory Committee for Aeronautics (ACA) was a UK agency founded on 30 April 1909, to undertake, promote, and institutionalize aeronautical research. In 1919 it was renamed the Aeronautical Research Committee, later becoming the Aeronautical ...

Anterior cerebral artery The anterior cerebral artery (ACA) is one of a pair of cerebral arteries that supplies oxygenated blood to most midline portions of the frontal lobes and superior medial parietal lobes of the brain. The two anterior cerebral arteries arise from t ...

Anti-cardiolipin antibodies Anti-cardiolipin antibodies (ACA) are antibodies often directed against cardiolipin and found in several diseases, including syphilis, antiphospholipid syndrome, livedoid vasculitis, vertebrobasilar insufficiency, Behçet's syndrome, idiopathic ...

Anti-centromere antibodies Anti-centromere antibodies (ACAs; often styled solid, anticentromere) are autoantibodies specific to centromere and kinetochore function. They occur in some autoimmune diseases, frequently in limited systemic scleroderma (formerly called CREST sy ...

* Acrodermatitis chronica atrophicans * Agile Combat Aircraft, forerunner to the

British Aerospace EAP The British Aerospace EAP (standing for ''Experimental Aircraft Programme'') was a British technology demonstrator aircraft developed by aviation company British Aerospace (BAe) as a private venture. It was designed to research technologies to ...

technology demonstrator aircraft * ACA₀, an axiom system in

reverse mathematics Reverse mathematics is a program in mathematical logic that seeks to determine which axioms are required to prove theorems of mathematics. Its defining method can briefly be described as "going backwards from the theorems to the axioms", in cont ...

Sport

Adventure Cycling Association Adventure Cycling Association is a nonprofit member organization focused on travel by bicycle (bicycle touring). Headquartered in Missoula, Montana, Adventure Cycling develops cycling routes, publishes maps, provides guided trips, and advocates ...

African Cricket Association The Africa Cricket Association (ACA) is an international body which coordinates the development of cricket in Africa. The ACA was founded in 1997, and has 23 member countries. The role of the ACA includes promoting the development of cricket in ...

American Canoe Association The American Canoe Association (ACA) is the oldest and largest paddle sports organization in the United States, promoting canoeing, kayaking, and rafting. The ACA sponsors more than seven hundred events each year, along with safety education, in ...

Argentine Cricket Association The Argentine Cricket Association (Spanish: ''Asociación de Críquet Argentino''; ACA), also branded Cricket Argentina, is the governing body of the sport of cricket in Argentina. The organization was founded in 1913, and has been an associate mem ...

Australian Cricketers' Association The Australian Cricketers' Association (ACA) is an organisation that represents the professional first-class cricketers of Australia, both past and present. It is not a formally registered Trade Union, but an Incorporated Association. Current adm ...

AC Ajaccio Athletic Club Ajaccio ( co, Athletic Club Aiacciu), commonly referred to as AC Ajaccio, ''ACA'' or simply Ajaccio, is a French association football club based in the city of Ajaccio on the island of Corsica. The club was founded in 1910 and ...

, a French professional football team * AC Arles-Avignon, a French professional football team *

Absolute Championship Akhmat Absolute Championship Akhmat (ACA), formerly known as Absolute Championship Berkut (ACB), is a Russian mixed martial arts, kickboxing and Brazilian jiu-jitsu organization and one of the leading promotions in Europe. To date, most events have been ...

, a mixed martial arts, kickboxing and Brazilian jiu-jitsu promotion based in Russia

Transport

Air Canada Air Canada is the flag carrier and the largest airline of Canada by the size and passengers carried. Air Canada maintains its headquarters in the borough of Saint-Laurent, Montreal, Quebec. The airline, founded in 1937, provides scheduled and ...

, by ICAO airline designator * Antioch–Pittsburg (Amtrak station), by station code, in Antioch-Pittsburg, California * Arctic Control Area, a Canadian airspace region *

Atlantic Coast Airlines Atlantic Coast Airlines (ACA) was an airline based in the United States owned by Atlantic Coast Holdings, Inc. It operated as United Express for United Airlines and Delta Connection for Delta Air Lines. It was headquartered in the Dulles area o ...

, later Independence Air * General Juan N. Álvarez International Airport, by IATA location identifier, in Acapulco, Guerrero, Mexico

Other uses

* aca, the ISO 639 code for the

Achawa language Achagua, or Achawa ( aca, Achawa), is an Arawakan language spoken in the Meta Department of Colombia, similar to Piapoco. It is estimated that 250 individuals speak the language, many of whom also speak Piapoco or Spanish Spanish might refer t ...

of Colombia *

Arabic chat alphabet The Arabic chat alphabet, ''Arabizi'', Franco-Arabic (), refer to the Romanized alphabets for informal Arabic dialects in which Arabic script is transcribed or encoded into a combination of Latin script and Arabic numerals. These informal chat ...