ELECTRONIC SENSORS FOR TRACKING AND CONTROL OF INVENTORY; RADIO FREQUENCY IDENTIFICATION (RFID) SENSORS FOR TRACKING AND CONTROL OF INVENTORY; ELECTRONICALLY AND MAGNETICALLY ENCODED LABELS, TAGS AND DETECTORS WITH BUILT IN INDICATORS FOR USE IN INVENTORY TRACKING AND CONTROL; PAPER LABELS AND TAGS THAT ARE ELECTRONICALLY RESPONSIVE TO RADIO FREQUENCIES BY MEANS OF AN ANTENNA FOR USE IN THE TRACKING AND CONTROL OF INVENTORY