PCB, OTHER MOUNTED PCB'S POPULATED, LOADED OR STUFFED PCB'S, INTEGRATED CIRCUITS, CAPACITORS, OTHER FIXED CAPACITORS, DIODES, CERAMIC DIELETRIC SINGLE LAYER. MULTILAYER, ADJUSTBLE (PRESET) CAPACITORS, TRANSISTORS, PHOTOSENSITIVE TRANSISTORS, THYRISTORS, ELECTRICAL RISTANCE WIRE, POTENTIONMETERS, RHEOSTATS ETC.