26 COMPONENTS FOR DATA PROCESSING EQUIPMENT-NAMELY, ELECTROMAGNETIC CORES, [ MEMORY PLANES, STACKS OF MEMORY PLANES WITH CONTROLLED NETWORKS, ] SHIELDING BEADS, THREADED SLUGS, CHOKE COILS, FILTERS, RESISTORS, MAGNETIC RECORDING HEAD ASSEMBLIES [ , MEMORY SYSTEMS, PELTIER BATTERIES WITH OR WITHOUT CONTROL NETWORKS, CAPACITORS, MAGNETO-STRICTIVE FERRITES ]