Methods and apparatus to visualize locations of radio frequency
identification (RFID) tagged items are described. One example method
includes processing received Radio Frequency (RF) waves to determine a
location of one or more radio frequency identification (RFID) tagged
items, indicating the location of one or more RFID tagged items via a
portable electronic device configured with a visual display, receiving at
the portable electronic device product information associated with a
selected individual RFID tag, receiving at the portable electronic device
one or more inputs to modify the product information associated with the
selected individual RFID tag, and transmitting the modified product
information associated with the selected individual RFID tag from the
portable electronic device to a database.