Just when it seemed as if the near-term promise of benefits for restaurateurs from radio frequency identification, or RFID, tags was starting to smell fishy, Seattle-based Blue C Sushi began using the technology to assure product freshness, improve purchases and track customer habits. RFID technology involves small, low-power chips that wirelessly transmit data, such as a unique identifier code, across small spaces to specialized readers. Such systems usually work with ...

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