Reactor

Bioreactor, is a device or system that supports a biologically active environment.
Chemical reactor, a device for containing and controlling a chemical reaction
Fusion reactor, a device for containing and controlling a fusion power reaction
An inductor (possessing reactance) in an electrical power grid
- A current limiting reactor is used to limit starting current of motors and to protect variable frequency drives
Nuclear reactor, a device for containing and controlling a nuclear reaction
Reactor (Havok), a physics simulation engine
The reactor pattern, a design pattern used in concurrent programming

Reactor an alternative title for the 1978 Italian film War of the Robots directed by Alfonso Brescia
Re-ac-tor, a 1981 album by Neil Young and Crazy Horse
Reactor (arcade game), an arcade game created by Gottlieb
Reactor, Inc., a defunct interactive entertainment company founded by Mike Saenz