programmable central controllers, interface cards and card cages, namely, frames in which circuit cards are mounted and electrically connected to other circuit cards and circuits, sold separately and as an integral component of remote control systems for use with audio, video and lighting equipment; integrated computerized, electronic system comprised of circuit board, control panel and electrical controller and related software for use in accessing and controlling slide projectors, video projectors, compact disc players, projection screens, lighting systems and other related audio/video equipment; integrated computerized, electronic system comprised of cardframes, control cards, floppy disk drives, slide controller, television control manager, master-post expander, wireless receivers, wired control panels, software panels, data signal modulator, infared enmitted cable, power controller, dual power controller, relay controller, receiver module, extended range antenna, relay receiver, incandescent dimmer module, wireless single projector control, wireless dual projector control and related software for use in accessing and controlling slide projectors, video projectors, compact disc players, projection screens, lighting systems and other related audio/video equipment