COMPUTER HARDWARE; COMPUTER OPERATING PROGRAM; COMPUTER FIRMWARE FOR OPERATING SYSTEM PROGRAMS; INTERFACE CARDS FOR COMPUTER; COMPUTER MOTHERBOARDS; ELECTRONIC PUBLICATIONS, NAMELY, USER MANUALS FOR AUDIO INTEGRATED CIRCUIT EVALUATION SYSTEMS RECORDED ON COMPUTER MEDIA; DOWNLOADABLE ELECTRONIC PUBLICATIONS, NAMELY, USER MANUALS FOR AUDIO INTEGRATED CIRCUIT EVALUATION SYSTEM; MODEMS (MODULATOR-DEMODULATOR); DIGITAL-TO-ANALOG CONVERTERS FOR CONVERTING SIGNAL FORM; ANALOG-TO-DIGITAL CONVERTERS F...