Apparatus for controlling the operation of machines (computer); apparatus for data communications between computers; apparatus for inputting information into a computer; apparatus for linking computers; apparatus for linking computers into networks; apparatus for protecting computers from electrical power supply faults; apparatus for receiving information from a computer; apparatus for use in communications between computers; articles adapted for use in the ducting of computer cables; articles adapted for use in the support of computer cables; boxes adapted for storing computer software disks; boxes adapted for transporting computer software disks; cases adapted for computers; circuit boards for use with computer keyboards; circuits for computers; cleaning discs for computer disk drives; communication devices for linking computer networks; communications electronics for computers; compact disc players for use with computers; component parts for computers; components for computers; computer apparatus; computer apparatus for computer aided manufacturing; computer apparatus for recording telephone calls; computer apparatus for the storage of data; computer buses; computer cables; computer cards (encoded); computer cards (magnetic); computer cards (smart); computer chips; computer circuits; computer communication apparatus; computer components; computer control devices; computer controlled desk top recording; computer controllers; computer data input apparatus; computer data input devices; computer data recorded on optical discs; computer design hardware; computer disc drives; computer discs; computer disks; computer display apparatus; computer display monitors; computer hard disc apparatus; computer hardware; computer housings; computer input devices; computer installations (networks); computer interface apparatus; computer interface devices; computer interface units; computer keyboards; computer magnetic memories; computer memories; computer memory storage apparatus; computer modems; computer monitoring apparatus; computer monitors; computer mouses; computer network apparatus; computer networking apparatus; computer networks; computer networks for the communication of data; computer networks for the storage of data; computer peripheral devices; computer screens; computer systems; computer workstations (apparatus and installations); computer workstations for electronic design; computers; disc (disk) drives for computers; disc drives (for computers); disk drives (for computers); home computers; housings for computers; interface boards for computers; interface cards for computers; joysticks for computers; joysticks for use with computers; keyboard apparatus for use with computers; keyboards for entering information into computers; keyboards for use with computers; laptop computers; laser printers for use with computers; linked computer networks; linking units for computers; magnetic discs bearing computer programmes; magnetic discs for recording computer programmes; magnetic discs for storing computer programmes; magnetic disks for computers; memories for computers; mice for computers; monitors (computer hardware); monitors for use with computers; mouse mats for use with computer apparatus; navigation apparatus for vehicles (on-board computers); navigation computers for cars; personal computers; portable computers; remote control apparatus connected by modems to computers; remote control units for computers; security devices for computer hardware; speakers for computers; storage racks for computer discs; storage racks for computer diskettes; storage racks for computer disks; telecommunications apparatus for transferring data to computers; telecommunications apparatus for transmitting data for use with computers; television display apparatus for use with computers; television display monitors for use with computers; toy computers (working)