Transportation
- Advanced transportation controller, a standardization effort as part of the United States Department of Transportation's Intelligent transportation system
- All-Terrain Cycle, or All-Terrain Vehicle, an off-road, 3-, 4-, or 6-wheel motorcycle-like vehicle
- Automatic Temperature Control (ATC), also known as Automatic Climate Control, an industry name for automatic Heating, Ventilating, and Air Conditioning (HVAC) systems for automobiles
- Automatic Train Control, a safety system for railways
- Aviation
- A Type certificate (ATC), awarded by aviation regulating bodies to aerospace manufacturers after it has established a design of an aircraft component that has fulfilled a regulating bodies' current prevailing airworthiness regulations
- Air traffic control, a service provided to aircraft by ground-based controllers
- Air traffic controllers, people who expedite and maintain a safe and orderly flow of air traffic in the global air traffic control system
Read more about this topic: ATC