TAC, or tac, may refer to:

People

Pablo Tac Pablo Tac (c. 1822–1841) was a Luiseño people, Luiseño (''Quechnajuichom'' also spelled "Qéchngawichum") Amerindian, Indian and indigenous scholar who provided a rare contemporary Native Americans in the United States, Native American perspe ...

, US scholar * Pham Cong Tac, a leader of the Cao Dai religion

Places

* Tác, a village in Fejér County, Hungary

Organisations

TAC (building automation) TAC is a Swedish-based building automation company in the fields of both energy and security. It also operates in other countries including the United Kingdom and the United States. It was originally established in 1925 as Tour Agenturer in St ...

, a Swedish building automation company *

Tactical Air Command Tactical Air Command (TAC) is an inactive United States Air Force organization. It was a List of Major Commands of the United States Air Force, Major Command of the United States Air Force, established on 21 March 1946 and headquartered at Lang ...

, a former command of the US Air Force * Technical Advisory Council, a committee advising the US FCC * Technical Assistance Center, a company's internal support group for external customers * The Aleut Corporation, Alaska, United States, a Native Regional Corporation * The Analysis Corporation, a private intelligence firm * The Ant Commandos, a company which produces video game console peripherals * The Asatru Community, an inclusive Norse Pagan/Heathen sect; see

Kindred (Heathenism) Heathenry, also termed Heathenism, contemporary Germanic Paganism, or Germanic Neopaganism, is a Modern paganism, modern pagan religion. Scholars of religious studies classify it as a new religious movement. Developed in Europe during the ea ...

The Athletics Congress USA Track & Field (USATF) is a United States national governing body for the sports of track and field Track and field (or athletics in British English) is a sport that includes Competition#Sports, athletic contests based on running, jum ...

, US sports governing body, became USATF in 1992 *

The Architects Collaborative The Architects Collaborative (TAC) was an American architectural firm formed by eight architects that operated between 1945 and 1995 in Cambridge, Massachusetts. The founding members were Norman C. Fletcher (1917–2007), Jean B. Fletcher (19 ...

, Cambridge, Massachusetts, US * Thomas Aquinas College, a college with multiple campuses in the US *

Transport Accident Commission The Transport Accident Commission (TAC) is the statutory insurer Insurance is a means of protection from financial loss in which, in exchange for a fee, a party agrees to compensate another party in the event of a certain loss, damage, ...

, government auto insurer in Victoria, Australia *

Treatment Action Campaign The Treatment Action Campaign (TAC) is a South African HIV/AIDS activist organisation which was co-founded by the HIV-positive activist Zackie Achmat in 1998. TAC is rooted in the experiences, direct action tactics and anti-apartheid backgro ...

, a South African AIDS organisation *

Treaty of Amity and Cooperation in Southeast Asia The Treaty of Amity and Cooperation in Southeast Asia (TAC) is a peace treaty among Southeast Asian countries established by the founding members of the Association of Southeast Asian Nations (ASEAN), a geo-political and economic organisation of ...

* Traditional Anglican Communion *

Transatlantic Council There have been American Scouts overseas since almost the inception of the movement, often for similar reasons as the present day. Within the Scouting America formerly the Boy Scouts of America (BSA), these expatriate Scouting, Scouts are now se ...

, Boy Scouts of America

Transport

* TAC Colombia, a charter airline based in Bogotá, Colombia * TAC, the IATA code for

Daniel Z. Romualdez Airport Daniel Z. Romualdez Airport , also known as Tacloban City Airport, is an airport serving the general area of Tacloban, a highly urbanized city in the Leyte island of the Philippines. It is the main gateway from Manila and Cebu to Eastern Visayas ...

on Leyte island, Philippines * TAC, the National Rail code for Tackley railway station in the county of Oxfordshire, UK * TAC - Transportes Aéreos Catarinense, a former Brazilian airline *

Tecnologia Automotiva Catarinense The Tecnologia Automotiva Catarinense (TAC) is an automotive corporation established by Adolfo Cesar dos Santos in 2004 in Joinville, Brazil. In the financial support of BNDES, the plant was opened after four years of construction on 13 March 2008 ...

(TAC) a Brazilian automotive company *

Terminal area chart In United States and Canada aviation, terminal area charts are aeronautical charts intended for navigation under Visual Flight Rules that depict areas surrounding major airports, primarily those with Class B airspace. Overview Like the VFR sect ...

, an aeronautical chart of the area surrounding a major airport *

Thai Airways Company Thai Airways Company or Thai Airways (TAC; ) was the domestic flag carrier of Thailand. Its main base was the domestic terminal (Terminal 3) at Don Mueang International Airport (then known as ''Bangkok International Airport''). Its head office ...

, a former Thai airline *

Trans Air Congo Trans Air Congo (TAC) is an airline based at Pointe Noire Airport in Pointe-Noire, Republic of the Congo. It is banned from flying into EU airspace. History The company was established on 24 August 1994 by the El-Hage family and started servic ...

, a Congolese airline *

, an insurer in Victoria, Australia

Military and law enforcement

Demro TAC-1 The Demro TAC-1 is a semi-automatic carbine chambered in either .45 ACP or 9×19mm Parabellum. The TAC-1 is the reintroduction of the Fox Carbine to the law enforcement market after a fallout between Gerard J. Fox, the inventor, and Dean Machine ...

, a pistol calibre carbine/submachine gun *

McMillan TAC-50 The McMillan TAC-50 is a long-range anti-materiel rifle. The TAC-50 is based on previous designs from McMillan, which first appeared during the late 1980s. From May 2017 until November 2023, it held the record for the longest confirmed sniper ki ...

, an American sniper rifle *

, a former major command of the United States Air Force * TAC 30, the official name of a

SWAT A SWAT (''Special Weapons and Tactics'') team is a generic term for a police tactical unit within the United States, though the term has also been used by other nations. SWAT units are generally trained, equipped, and deployed to res ...

unit belonging to the King County Sheriff's Office

Science and technology

* Motorola TAC, brand used by Motorola for their early mobile phones (Total Area Coverage) * TAC, a codon for the amino acid

Tyrosine -Tyrosine or tyrosine (symbol Tyr or Y) or 4-hydroxyphenylalanine is one of the 20 standard amino acids that are used by cells to synthesize proteins. It is a conditionally essential amino acid with a polar side group. The word "tyrosine" is ...

* TAC, a mixture of

tetracaine Tetracaine, also known as amethocaine, is an ester local anesthetic used to numb the eyes, nose, or throat. It may also be applied to the skin before starting intravenous therapy to decrease pain from the procedure. Typically it is applied as a l ...

, adrenaline and cocaine, a liquid sometimes given as a soothing gel to children * TaC, chemical formula for Tantalum carbide * tac, a Linux command that concatenates lines in reverse, named by analogy with

cat 








The cat (''Felis catus''), also referred to as the domestic cat or house cat, is a small  domesticated carnivorous mammal. It is the only domesticated species of the family Felidae. Advances in archaeology and genetics have shown that the   ...

* TAC (software), an instant messaging and chat client program * TAC-2, game controller compatible with Atari 2600 video game systems * Terminal Access Controller, a host computer that accepts terminal connections * Thermally Advantaged Chassis, an Intel computer specification *

Three-address code In computer science, three-address code (often abbreviated to TAC or 3AC) is an intermediate language, intermediate code used by optimizing compilers to aid in the implementation of code-improving transformations. Each TAC instruction has at most t ...

, a representation of intermediate code used by compilers * Time-activity curve, tracer concentration within a region of interest within dynamic image plotted over time * Triacetyl cellulose, a polymer used in display applications *

Trigeminal autonomic cephalgia Trigeminal autonomic cephalalgia (TAC) refers to a group of primary headaches that occurs with pain on one side of the head in the trigeminal nerve area and symptoms in autonomic systems on the same side, such as eye watering and redness or droop ...

, a type of headache that occurs on one side of the head * Type Allocation Code, part of a mobile device's IMEI identifying maker and model * TAC (Total Action Center), codename for the

Xbox Xbox is a video gaming brand that consists of four main home video game console lines, as well as application software, applications (games), the streaming media, streaming service Xbox Cloud Gaming, and online services such as the Xbox networ ...

2001 console.

Media

Group TAC was a Japanese animation and computer graphics studio located in Shibuya, Tokyo, and founded in 1968 from former Mushi Pro staff. They worked on movies, videos, TV shows, and commercials, and contributed to all stages of the process, including ...

, a Japanese anime and computer graphics studio * The Accessible Channel, a Canadian digital television channel * ''

The American Conservative ''The American Conservative'' (''TAC'') is a bimonthly magazine published by the American Ideas Institute. The magazine was founded in 2002 by Pat Buchanan, Scott McConnell and Taki Theodoracopulos to advance an anti- neoconservative perspect ...

'', a paleoconservative magazine published by the American Ideas Institute

Other

* tac, the ISO 639-3 code for the Tarahumara language spoken in the state of Chihuahua, Mexico * Terrible-Monster Attacking Crew, a fictional pilot squadron in ''

Ultraman Ace is the fourth entry (fifth overall) in the Ultra Series. Produced by Tsuburaya Productions, the series aired on Tokyo Broadcasting System from April 7, 1972, to March 30, 1973, with a total of 52 episodes. Starting from this show, the Ultra Seri ...

'' * The Arts Centre or TAC, former name of

Home of the Arts, Gold Coast Home of the Arts (HOTA), opened as the Keith Hunt Community Entertainment and Arts Centre in 1986 and subsequently renamed The Arts Centre Gold Coast (TAC) and Gold Coast Arts Centre, is a cultural precinct situated in Surfers Paradise, City of ...

Total allowable catch The Common Fisheries Policy (CFP) is the fisheries policy of the European Union (EU). It sets quotas for which member states are allowed to catch each type of fish, as well as encouraging the fishing industry by various market interventions. ...

, in commercial fishing under the European Union's Common Fisheries Policy *Traffic Acquisition Costs, the costs an online service provider has to get routed traffic from other websites to their service