TAC

TAC may refer to:

• Tác, Hungary
• Pablo Tac, a Luiseño Indian who provided a rare contemporary Native American perspective on the institutions and early history of California
• Pham Cong Tac, the Pope of the Cao Dai Sect that battled against Ngo Dinh Diem in control of South Vietnam
• Tarsus American College
• Thomas Aquinas College

In automotive

• Tecnologia Automotiva Catarinense (TAC) a Brazilian automotive company
• Transport Accident Commission in Australia

In transportation:

• TAC Colombia, a charter airline based at El Dorado International Airport in Bogotá, Colombia
• TAC - Transportes Aéreos Catarinense, a Brazilian airline that ceased to exist in 1966
• Thai Airways Company, a former airline
• Terminal area chart, an aeronautical chart intended for navigation under Visual Flight Rules that depict areas surrounding major airports
• Transport Accident Commission, the statutory insurer of third-party personal liability for transport accidents in Victoria, Australia
• Trenau Arriva Cymru, Welsh for Arriva Trains Wales

In military/law enforcement:

• Demro TAC-1, a pistol calibre carbine/submachine gun
• .408 Chey Tac, a rifle cartridge that was developed by Dr. John D. Taylor with the assistance of machinist William O. Wordman
• CheyTac Intervention, an American bolt action sniper rifle
• McMillan TAC-50, a military/law enforcement sniper rifle chambered in .50 BMG
• Tactical Air Command, a former command of the United States Air Force charged with battlefield-level air combat
• SWAT or TAC, used by some law enforcement agencies to denote special weapons and tactics (SWAT) units and operations

In technology:

• Group TAC, a Japanese anime and computer graphics studio located in Shibuya, Tokyo
• TAC (software), an open source instant messaging and chat client program written by AOL
• tac (Unix), a program that concatenates lines in reverse
• Terminal Access Controller, a host computer that accepts terminal connections
• Thermally Advantaged Chassis, an Intel specification for improved computer cooling when using an Intel Pentium 4, Pentium D, or Celeron D
• Three address code, a representation of intermediate code used by compilers
• Type Allocation Code, a portion of a mobile device's IMEI code used to identify the manufacturer and model
• Triacetyl cellulose, a polymer, usually in film form, used in various display applications
• Technical Assistance Center, a company's internal support group for external customers
• TAC (building automation), a Swedish-based building automation company originally established in 1925. Owned by Schneider Electric
• Type Allocation Code (TAC) is the initial eight-digit portion of the 15-digit IMEI code used to uniquely identify wireless devices.

In medicine:

• Tetracaine, adrenalin, and cocaine. Used for topical anesthesia
• trigeminal autonomic cephalgia

In other fields:

• Tantalum Carbide, a chemical compound with the chemical formula TaC
• Traditional Anglican Communion
• Tartu Aviation College, the old name of the Estonian Aviation Academy
• Technical Advisory Committee, of the Florida Building Commission
• Technical Advisory Council, a federal advisory committee of the Federal Communications Commission
• The Accessible Channel, a Canadian digital television channel
• The Aleut Corporation, an Alaska Native Regional Corporation created under the Alaska Native Claims Settlement Act of 1971
• The Athletics Congress The United States national governing for the sport of Track and Field from 1979 until it was renamed USATF in 1992
• The Architects Collaborative, a Cambridge, MA, firm following the teachings of Walter Gropius
• Total Allowable Catch, a commercial fishing regulation to limit the maximum catch of a specific fish species within an area
• Treatment Action Campaign, a South African grassroots pressure group which was founded by Zackie Achmat
• Treaty of Amity and Cooperation in Southeast Asia
• Traditional Anglican Communion, group of theologically conservative Anglicans
• The American Conservative, a conservative magazine from the old right or paleoconservative perspective founded by Pat Buchanan, Scott McConnell and Taki Theodoracopulos
• Terrible Monster Attack Crew, a fictional pilot squadron in Ultraman Ace

In gaming:

• TAC-2, an Atari 2600 compatible game controller
• The Ant Commandos, a company which produces video game console peripherals