The atmospheric recycle and processing subsystem was a subsystem of the life support system. Aboard the Galaxy-class starships, there were at least two of these subsystems.

In 2368, after the computer systems of the USS Enterprise-D were disrupted by a energy wave from a Satarran starship, Geordi La Forge accessed the basic system directories of the Engineering Department. According to the department, the atmopsheric recycle and processing subsystems had nominal function. (TNG: "Conundrum")