9 BAR CODE READERS, CAPACITORS AND CAPACITOR NETWORKS, COMPUTERS, CONNECTORS, DISKETTES, DISK DRIVES, OPTIC FIBERS, INTEGRATED CIRCUITS, INTERFERENCE FILTERS, MEMORY UNITS, MICROCOMPUTERS, MICROWAVE/RF SEMICONDUCTORS, MODEMS, POTENTIOMETERS, PRINTERS, RELAYS, RESISTORS AND RESISTOR NETWORKS, SEMICONDUCTORS, SOCKETS, THUMBWHEEL AND DIP SWITCHES, ELECTRICAL TERMINALS