Full form of AC is Air Conditioner / Air Conditioning

An Air Conditioner is an electronic device that can control and change the air temperature and moisture content of the air and provide air ventilation inside a closed space.

The term often refers to electronic devices used for cooling the otherwise warm surrounding air. Air conditioners form a part of HVAC - Heating, Ventilation, and Air Conditioning systems in the construction business.

Some commonly used types of Air Conditioning systems are Split AC, Window AC, Centrally controlled AC systems, Portable AC systems, and Ductless AC systems.