All Things Considered summary and related information.

Air traffic control, a service provided to aircraft by ground-based controllers

Air Training Corps, United Kingdom

All-terrain (motor)cycle — see all-terrain vehicle

Air Transport Command, a United States Army Airforce command during World War II

Air Training Corps, New Zealand

All Things Considered, a news show on National Public Radio in the United States

Automatic Train Control, a safety system for railways

Audio Tele-Conference, or conference call

Average total cost, a concept in economics

Academy for Technology and the Classics, a charter school in Santa Fe, NM

Artist trading cards, individual fine art miniatures

American Tobacco Company, an early 20th century monopolistic tobacco company that was broken up into several major companies in 1911

Appalachian Trail Conservancy, a United States nonprofit organization

A Touch of Class, pop music group from Germany

Atlanta Transit Company, operated transit in Atlanta, Georgia from 1950 to 1972

Audio Technologies and Codecs, a multimedia development company

Anatomical Therapeutic Chemical Classification System for drugs

Advanced Technology Center (DBCC), a community college in Florida, USA

American Turkish Council, a business association promoting U.S.-Turkish relations

Advanced tactical center, a series of software tools for computer games

Aquarian Tabernacle Church, a Wiccan church founded in 1979

Argentina Televisora Color, Argentina's state-owned TV station.

Athletic Trainer Certified, a health care provider for athletes

Air Training Command, the predecessor to Air Education and Training Command in the United States Air Force

Advanced Technology Center, a Microsoft research and development group

American Thermoplastic Company, a United States plastics manufacturer

Again to Carthage, the sequel to Once a Runner by John L. Parker Jr.

Australian Telecommunications Commission, later renamed Australian Telecommunications Corporation