Electrical and electronic control apparatus and instruments; namely, personal computers; computer work-stations comprising monitors, optical scanners, mouses, keyboards, printers and hard disk drives; microprocessor integrated circuits, disk controllers, mouses, central processing integrated circuits, mathematics co-processor integrated circuits, virtual memory control circuits, input/output plugs and sockets, video graphics array adaptors, real time clocks/calendar interfaces, loudspeakers; electronic data processing and computer apparatus and installations; namely, computers, liquid crystal display screens, battery packs, uninterruptible power supplies; electronic data communications and telecommunications apparatus and installations, namely, modems, modem circuit boards and cards, word processors; electronic data recording and data storage apparatus and installations; namely, read only memory chips and random access memory circuit boards and cards, blank hard disks and hard drives, blank floppy disks and floppy drives, tape streamers, laser disks, bubble memory circuits, visual display units, computer keyboards, computer memory modules, computer printers; all for use with the aforesaid apparatus; namely, dot-matrix printers, bubble-jet printers, laser printers, daisy-wheel printers, thermal printers, and plotting printers, blank magnetic cards, magnetic and optical discs and blank magnetic tapes, all for use with the aforesaid apparatus; computer operating programs; namely firmware, real-time computer operating systems for microprocessors, resident programming languages and computer software development tools, and basic input/output systems, namely, optical scanners, hard disk drives, cards for access to networks, monitors and printers; semi-conductor integrated circuit boards; parts and fittings for all the aforesaid goods