A

COMPACT DISCS, MICROCOMPUTERS, MAINFRAME COMPUTERS, COMPUTER DATA STORAGE DEVICES, NAMELY, MAGNETIC TAPE, MAGNETIC DISCS AND OPTICAL DISCS, COMPUTER PROGRAMS RECORDED ON MAGNETIC DISCS AND OPTICAL DISCS IN THE FIELD OF DIGITAL-TO-ANALOG CONVERSION AND ANALOG-TO-DIGITAL CONVERSION; PULSE GENERATORS; SIGNAL CONVERTERS; DIGITAL-TO-ANALOG CONVERTERS; ANALOG-TO-DIGITAL CONVERTERS; COMPUTER INTERFACE CARDS; SINGLE BOARD COMPUTERS; AND INDUSTRIAL COMPUTERS