Electronic equipment and instruments, namely, computer hardware for the purpose of computer analysis, computer diagnostics, computer signalling and for the purpose of the conversion of data and for the purpose of the control of computer networks with the aim of maintaining and securing network; electrical and electronic apparatus and instruments, namely, data processing equipment, computer switches, PC electronic circuit cards, network cards, network access server hardware, computer network bridges, computer network hubs, computer network switches, network routers, brouters being computer network bridge routers, transceivers, wireless network repeaters, concentrators in the nature of amplifiers for wireless communications, modems, print servers in the nature of network servers, computer interface boards, media converters, integrated circuits; computer programs and software for computer network analysis and computer diagnostics and controlling communication between computers; computers, computer peripherals, network routers and servers; communication equipment for the purpose of computers, namely, communication hubs; computer network hubs; input and output devices namely, digital input and output scanners; computer control equipment, namely, remote cursor controls for computers