In the Sciences Bioreactor, a device which controls 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 (software), a physics simulation engine In Software Engineering The reactor design pattern, a design pattern used in concurrent programming Reactor, A library for Java and other JVM-based languages that provides a framework for programs that are based on the reactor design pattern. In entertainment Reactor an alternative title for the 1978 Italian film War of the Robots directed by Alfonso Brescia Reactor (film), an American action thriller film starring Bruce Willis 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 Reactor, a comedy series hosted by David Huntsberger on Syfy The Reactor (show rod), a show car built by Gene Winfield External links