Facsimile machines, telephone-operated printers, wireless telephones, telephones, image telephones, cellular phones, computers, blank floppy discs, computer keyboards, computer peripherals, microprocessors, microcomputers, computer monitors, computer mouses, blank compact discs, computer printers, portable computers; television sets; plasma display panels; computer software for use in operating communication networks and for data base management; computer programs for data base management and for operating communication networks; computer hardware using local area networks and wide area networks; network interface and adapter cards for connecting computers and modems; hubs and concentrators for use on computer networks; repeaters for use on computer networks; bridges for use on computer networks; routers for use on computer networks; multi-protocol routers for use on computer networks; modems for computers; computer hardware for managing networks; computer hardware for use in video conferencing