Low- and high-frequency tags work better on products with water and metal. In fact, there are applications in which low-frequency RFID tags are embedded in metal auto parts to track them. Radio waves ...

Symbol Technologies' $230 million cash bid last week to buy Matrics, a maker of RFID tags, is another clear indicator that this technology will become more ubiquitous in the next two years.

RFID credit cards are growing in popularity and have already been adopted by major credit card issuers. These cards use radio ...