9 ELECTRICAL APPARATUS, NAMELY, POWER SUPPLIES, UNINTERRUPTED POWER SOURCES, POWER SYSTEM ISOLATORS, FILTERS, AMPLIFIERS, TRANSMITTERS, RECEIVERS, OPTICAL SIGNAL TRANSMITTERS AND RECEIVERS,ACOUSTIC REPRODUCERS, MAGNETIC DATA CARRIER READERS AND WRITERS,DIGITAL TAPE MACHINES, DIGITAL VIDEO DISK MACHINES, AND PARTS THEREOF; BLANK MAGNETIC DATA CARRIERS; CASH REGISTERS AND CALCULATORS; ALL THE FOREGOING EXCLUDING DEBIT AND CREDIT CARDS; DATA PROCESSING EQUIPMENT, NAMELY, COMPUTERS, CENTRAL PROCESSING UNITS,COMPUTER MEMORIES, COMPUTER DISK DRIVES, COMPUTER TAPE AND DISK READERS, MEMORIES, COMPUTER PERIPHERALS, NAMELY, DISPLAY TERMINALS,INPUT AND OUTPUT TERMINALS, AND PARTS THEREOF, JOY STICKS, BALL AND MOUSE CONTROLLERS