# TAC

TAC, or tac, may refer to:

## People

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

## Places

* Tác, a village in Fejér County, Hungary

## Organisations

* TAC (building automation), a Swedish building automation company
* Tactical Air Command, 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)
* The Athletics Congress, US sports governing body, became USATF in 1992
* The Architects Collaborative, Cambridge, Massachusetts, US
* Thomas Aquinas College, a college with multiple campuses in the US
* Transport Accident Commission, government auto insurer in Victoria, Australia
* Treatment Action Campaign, a South African AIDS organisation
* Treaty of Amity and Cooperation in Southeast Asia
* Traditional Anglican Communion
* Transatlantic Council, Boy Scouts of America

## Transport

* TAC Colombia, a charter airline based in Bogotá, Colombia
* TAC, the IATA code for Daniel Z. Romualdez Airport 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 (TAC) a Brazilian automotive company
* Terminal area chart, an aeronautical chart of the area surrounding a major airport
* Thai Airways Company, a former Thai airline
* Trans Air Congo, a Congolese airline
* Transport Accident Commission, an insurer in Victoria, Australia

## Military and law enforcement

* Demro TAC-1, a pistol calibre carbine/submachine gun
* McMillan TAC-50, an American sniper rifle
* Tactical Air Command, a former major command of the United States Air Force
* TAC 30, the official name of a SWAT 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
* TAC, a mixture of tetracaine, 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
* 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, 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, 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 2001 console.

## Media

* Group TAC, a Japanese anime and computer graphics studio
* The Accessible Channel, a Canadian digital television channel
* The American Conservative, 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
* The Arts Centre or TAC, former name of Home of the Arts, Gold Coast
* Total allowable catch, 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