1. A computer-implemented method of managing inventory, comprising: receiving, at an antenna operatively coupled to a radio-frequency identification (RFID) reader, product identification information encoded in an RF signal transmitted by a plurality of RFID tags, each of the plurality of RFID tags associated with a respective one of a plurality of products; processing, by a processor, the product identification information contained in a portion of the encoded RF signal to identify a characteristic associated with each of the plurality of products; and identifying, by the processor using the product identification information, a first of the plurality of products having a characteristic different from at a second of the plurality of products.