9 telecommunications and teleconferencing equipment, namely, voice and data modems, writing tablets and computer software for use in interactive teleconferencing; private telephone systems; electronic voice mail systems, voice messaging systems; video and multimedia systems; and television cable systems all of the above systems being comprised of computers, computer circuit boards, modems, digital signal processing boards, telephone and data network switches, communications boards, logic boards, network interface boards, telephone and data transmission interface boards and circuits, power supplies and related computer software as well as instructional manuals distributed therewith