Radio frequency identification devices (RFIDs)
Radio frequency identification (RFID) is a product tracking technology that will soon become nearly universally applied. An RFID device, often called a tag, can be attached to a piece of merchandise and inform a reader about the nature and location of what it is attached to. Figure 8.5 shows how the reader can relay this information to a management system that can create a picture of what merchandise is where at a level of detail that has not previously been possible.