9 Computer hardware and software in the field of voice processing; circuit cards used in voice processing systems; digital telephony interfaces; components for digital voice and automated telephony, namely, digital telephony interfaces, voice digitizing interfaces for computers and computer control telephone interfaces; audio coupling interfaces between telephone and computers, and digitized voice-editing computer programs, audio multiplexers plug-in circuit boards and computer programs which provide communications between a personal computer and a facsimile machine; computer communications equipment, namely, modems, printed circuit cards and computer programs for synchronous communication between mainframe computers, microcomputers, mini-computers, personal computers and facsimile machines