communications systems, telephone and telephone messaging systems, voice mail and voice messaging systems, electronic mail systems, automated attendant systems, interactive voice response systems, database access and processing systems, video and multimedia systems, and fax processing systems, all of the above systems being comprised of computers, computer circuit boards, modems, audio interface and conversion boards and circuits, digital signal processing boards, communications boards, logic boards, telephone and data transmission interface boards and circuits, voice and video analysis and response processors, power supplies, user interface circuits and related computer software; and computer software for use in voice mail and voice messaging, electronic mail, automated attendant, interactive voice response, call processing, word processing, fax processing, database access, data retrieval and processing, multimedia applications, and for graphical user interfaces, and instructional manuals distributed therewith