# AC

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> Source: https://en.wikipedia.org/wiki/AC
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> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

**AC**, **A.C.**, **A/C**, or **Ac** most often refers to:

- [Air conditioning](/source/Air_conditioning), often abbreviated as A/C
- [Alternating current](/source/Alternating_current), a type of electrical current in which the current repeatedly changes direction

**AC**, **A.C.**, **A/C**, or **Ac** may also refer to:

## Arts and entertainment

### Gaming

- *[Ace Combat](/source/Ace_Combat)*, a series of combat flight simulator games
- *[Animal Crossing](/source/Animal_Crossing)*, a series of community simulation games
- *[Anonymous;Code](/source/Anonymous;Code)*, a visual novel in the Science Adventure series
- *[Another Code](/source/Another_Code:_Two_Memories)*, a series of adventure games
- *[Armored Core](/source/Armored_Core)*, a series of mecha-based third person shooter games
- *[Asheron's Call](/source/Asheron's_Call)*, a fantasy massively multiplayer online role-playing game
- *[Assassin's Creed](/source/Assassin's_Creed)*, a series of action-adventure games
- *[Assetto Corsa](/source/Assetto_Corsa)*, a racing simulator game
- *[Astral Chain](/source/Astral_Chain)*, an action-adventure hack and slash game
- [Armor class](/source/Armor_class), a combat-related parameter in the *Dungeons & Dragons* role playing game system
- A.C., a character in *[Fortnite: Save the World](/source/Fortnite:_Save_the_World)*

### Music

- [A. C. Newman](/source/A._C._Newman), solo stage name for Canadian musician Carl Newman
- [AC/DC](/source/AC/DC), an Australian rock band formed in Sydney in 1973
- [Adult contemporary music](/source/Adult_contemporary_music), a genre description used mainly in radio broadcasting
- [Adult Contemporary (chart)](/source/Adult_Contemporary_(chart))
- [Anal Cunt](/source/Anal_Cunt), an American musical group

### Other media

- [AC Comics](/source/AC_Comics), a comic book publisher established in 1969
- [A.C. Slater](/source/A.C._Slater), a fictional character in the American sitcom *Saved by the Bell*
- *[After Colony](/source/After_Colony)*, an alternate timeline in the *Gundam* metaseries for the universe of *Gundam Wing*
- AC, the name of the "ultimate computer" in Isaac Asimov's novel *[The Last Question](/source/The_Last_Question)*
- [Asianovela Channel](/source/Asianovela_Channel), a defunct Filipino TV channel

## Organizations

### Businesses

- [AC Cars](/source/AC_Cars), a British specialist automobile manufacturer
- AC Spark Plug, Delco, AC-Delco, and [ACDelco](/source/ACDelco), automotive parts brands owned by General Motors
- [AC Hotels](/source/AC_Hotels), a hotel chain owned by Marriott International
- [AC Restaurants](/source/AC_Restaurants), a hotel and restaurant chain in the Benelux
- [Air Canada](/source/Air_Canada), the flag carrier and largest airline of Canada (IATA code AC)
- [Allis-Chalmers](/source/Allis-Chalmers), a former industrial conglomerate
- [Anderson, Clayton and Company](/source/Anderson,_Clayton_and_Company), former American cotton trading firm
- [Associated Content](/source/Associated_Content), an online publisher and distributor of original content
- [Ayala Corporation](/source/Ayala_Corporation), a holding company (Philippine Stock Exchange symbol AC)

### Politics

- [Action Congress of Nigeria](/source/Action_Congress_of_Nigeria), a political party
- [Advisory Council on Youth](/source/Advisory_Council_on_Youth), a non-governmental decision-making body in the Council of Europe.
- [Alternative for Change](/source/Alternative_for_Change) (*Alternativa por el Cambio*), a political party in Nicaragua
- [Coast Alliance](/source/Coast_Alliance) (*Alianza Costeña*), a former regional political coalition in Nicaragua

### Other organizations

- [AC – The Danish Confederation of Professional Associations](/source/AC_%E2%80%93_The_Danish_Confederation_of_Professional_Associations), an umbrella organisation for several Danish trade unions
- [AC Transit](/source/AC_Transit), a regional public transit agency in the San Francisco Bay Area
- [Ad Council Japan](/source/Ad_Council_Japan) (AC Japan), an organization that distributes Japanese public service announcements
- [Athletics Canada](/source/Athletics_Canada), the governing body of athletics in Canada
- [Civic Alliance Foundation](/source/Civic_Alliance_Foundation) (*Alianţa Civică*), a Romanian non-governmental organization
- [Anthrocon](/source/Anthrocon), a furry convention held in Pittsburgh, Pennsylvania, US
- [Audit Commission (Hong Kong)](/source/Audit_Commission_(Hong_Kong)), a government department in Hong Kong Special Administrative Region
- [Aryan Circle](/source/Aryan_Circle), a white supremacist, Neo-Nazi prison gang spread throughout many U.S. correctional facilities

## People

- [AC Bonifacio](/source/AC_Bonifacio) (born 2002), a Philippine-Canadian actress, singer and dancer
- [A. C. Green](/source/A._C._Green) (born 1963), retired professional basketball player
- [A. C. Grayling](/source/A._C._Grayling) (born 1949), British philosopher
- [Al Cowlings](/source/Al_Cowlings) (born 1947), retired American football player
- Nickname for [Andreas Christensen](/source/Andreas_Christensen) (born 1996), Danish footballer

## Places

- [.ac](/source/.ac), Internet top-level domain name for Ascension Island
- [Aachen](/source/Aachen), a spa town in North Rhine-Westphalia, Germany
- [Acre (state)](/source/Acre_(state)), Brazil
- [Aleksandrovac](/source/Aleksandrovac), Serbia (vehicle registration plate code AC)
- [Antigua and Barbuda](/source/Antigua_and_Barbuda), obsolete two-letter FIPS and NATO codes
- [Atlantic City, New Jersey](/source/Atlantic_City,_New_Jersey), US

## Ranks, titles, and awards

- *Aelod y Cynulliad*, title for Members of the [National Assembly for Wales](/source/Senedd)
- [Aircraftman](/source/Aircraftman), an air forces rank
- [Ashoka Chakra (military decoration)](/source/Ashoka_Chakra_(military_decoration)), India's highest peacetime military decoration
- [Assistant Commissioner of Police of the Metropolis](/source/Assistant_Commissioner_of_Police_of_the_Metropolis), a rank in London's Metropolitan Police
- Companion of the [Order of Australia](/source/Order_of_Australia)
- [First assistant camera](/source/First_assistant_camera) or [Second assistant camera](/source/Second_assistant_camera), in film-making
- [Aviation Cadet](/source/Aviation_Cadet), a military rank sometimes written as A/C

## Science and technology

### Biology and medicine

- [Acromioclavicular joint](/source/Acromioclavicular_joint) (*AC joint*), the shoulder junction between the scapula and the clavicle
- [Adenylate cyclase](/source/Adenylate_cyclase), a lyase enzyme
- [Adriamycin](/source/Adriamycin) and [cyclophosphamide](/source/Cyclophosphamide), a chemotherapy regimen used to treat breast cancer
- Ante cibum (*ac*), Latin for "before meal", commonly seen in [medical prescriptions](/source/Medical_prescription)
- [Anterior commissure](/source/Anterior_commissure), a bundle of nerve fibers connecting the two temporal lobes of the brain
- [Anterior cruciate ligament](/source/Anterior_cruciate_ligament) (*AC ligament* or *ACL*), a major ligament in the knee
- [Appropriateness criteria](/source/Appropriateness_criteria), when it is appropriate to perform a medical procedure or service
- [Assist control](/source/Assist_control), a former term for continuous mandatory ventilation, a mode of mechanical ventilation
- [Adenocarcinoma](/source/Adenocarcinoma), a type of cancerous tumor
- [Allergic conjunctivitis](/source/Allergic_conjunctivitis), inflammation of the conjunctiva

### Chemistry

- [Acetyl group](/source/Acetyl_group), a functional group in chemistry
- [Actinium](/source/Actinium), symbol Ac, a chemical element
- Hydrogen cyanide, AC in [chemical weapons](/source/Chemical_weapon) classification

### Computing and telecommunications

- [.ac](/source/.ac), Internet top-level domain name for Ascension Island
- [.ac (second-level domain)](/source/.ac_(second-level_domain)), Internet second-level domain used to denote academic institutions in many countries
- [AC (complexity)](/source/AC_(complexity)), a hierarchy of complexity classes found in circuit complexity
- AC, initialism of [access control](/source/Access_control)
- [Artificial consciousness](/source/Artificial_consciousness), a field related to artificial intelligence and cognitive robotics
- [Authorization certificate](/source/Authorization_certificate) or attribute certificate, a digital permission to use a service or resource
- [Arithmetic coding](/source/Arithmetic_coding), a form of entropy encoding used in lossless data compression
- Alternating component a.k.a. AC coefficient in [discrete cosine transform](/source/JPEG#Discrete_cosine_transform)
- [IEEE 802.11ac-2013](/source/IEEE_802.11ac-2013), a wifi standard using 5 GHz, released in Dec 2013

### Meteorology

- [Altocumulus cloud](/source/Altocumulus_cloud), a medium-level cloud type
- [Anticipated convection](/source/Anticipated_convection), convective outlooks issued by the U.S. National Weather Service

### Other uses in science and technology

- [Air conditioning](/source/Air_conditioning), technologies for altering the temperature and humidity of air
- Across corners (A/C), a measure of [external diameter of hexagonal nuts](/source/Nut_(hardware)#Standard_metric_hex_nuts_sizes)
- [Alternating current](/source/Alternating_current), a type of electric current - [AC power](/source/AC_power), a net transfer of energy over a complete cycle of the alternating current waveform
- [Asphalt concrete](/source/Asphalt_concrete), a type of road or path surfacing
- [Average cost](/source/Average_cost), in economics
- [Axiom of choice](/source/Axiom_of_choice), a mathematical concept in set theory
- A US Navy hull classification symbol: [Collier (AC)](/source/List_of_auxiliaries_of_the_United_States_Navy#Colliers_(AC))

## Other uses

- [Ac (rune)](/source/Ac_(rune)) (ᚪ), a rune of the Anglo-Saxon fuþorc and a continuation of the Elder Fuþark ansuz
- [Abkhazian Cup](/source/Abkhazian_Cup), football cup competition in Abkhazia
- [AC Milan](/source/AC_Milan), an Italian football club based in the city of Milan
- [Acre](/source/Acre), a unit of area with the symbol *ac*
- [Advisory circular](/source/Advisory_circular), a publication to provide guidance for compliance with airworthiness regulations
- [After Christ](/source/After_Christ), known as the Common Era (CE)
- [Ante Christum](/source/Ante_Christum) or A.C., a Latin term meaning "before Christ"
- [Antichrist](/source/Antichrist), a Biblical prophecy about one who will oppose Jesus Christ and substitute himself in Christ's place
- [Appeal Cases](/source/Appeal_Cases), or A.C., a UK law reporter covering decisions of the House of Lords, Supreme Court, Privy Council, and Court of Appeal
- [Ancol railway station](/source/Ancol_railway_station), a railway station in Jakarta, Indonesia
- [Ards Circuit](/source/Ards_Circuit), motorsport racing circuit
- [Armor class](/source/Armor_class), a common property in role playing games used to determine the amount of armor a character has
- [Army Corps](/source/Army_Corps), an operational formation, sometimes known as a field corps, which consists of two or more divisions
- [Atlantic College](/source/Atlantic_College), an international IB Diploma Programme residential Sixth Form College in the Vale of Glamorgan in Wales
- Auto Calesa, a war-time short-body version of the Philippine [jeepney](/source/Jeepney)

## See also

- [AC/DC (disambiguation)](/source/AC/DC_(disambiguation))

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Adapted from the Wikipedia article [AC](https://en.wikipedia.org/wiki/AC) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/AC?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.