-RFID -GPS -"Active" RFID/GPS tagging -"Passive" RFID/GPS tagging (this is the newest form, most versatile, and the one that only ECDC has patented; thus why this is actually such a big deal)...
Don't try to compare a RFID device on a pallet of Cheerios to the EarthSearch system for asset tracking. Their only commonality is the use of RFID technology.