Computer peripherals; computer peripherals for accessing and controlling multiple computers and servers with a single keyboard, monitor and mouse; computer peripherals for allowing a plurality of users to independently access and control a plurality of computers and servers from a plurality of keyboards, monitors and mice; computer peripherals for remote access and control of computers and servers; video transmission apparatus, namely, splitter for displaying the output from a single computer on multiple monitors; computer peripheral hardware for transmitting keyboard, monitor, mouse, audio and serial data signals over a distance; computer networking hardware; interface cards for data processing equipment in the form of printed circuits; data switching apparatus, namely, Ethernet switches and computer network switches; data transfer equipment, namely, data processors, modems, computer network hubs, switches and routers; cable splitters and telephone-activated power switches, namely, cables and computer hardware for linking computers with peripherals, keyboards, video display monitors and mice; computer hardware, namely, display terminals, monitors and interface cards and computer operating software; computer hardware and associated software for on-screen programming of computer peripherals; computer peripherals hardware for transmitting keyboard, mouse and video signals between a local computer and a remote computer over a computer communications link; computer cabinets to house computer network servers and related computer equipment; racks for mounting computer equipment; power switches; communication hubs; video transmission switch apparatus to switch the video output from a plurality of computers; converter; and computer peripherals for monitoring environment in server room