RFID technology uses radio waves to automatically identify objects. It consists of RFID tags attached to objects and RFID readers that can read the tags. RFID tags contain information like a serial number that is transmitted to the reader when it is in range. Common applications of RFID include credit cards, electronic toll collection, supply chain management and library management. A survey found that respondents thought logistics/supply chain and library management were the industries most suitable for RFID application. While RFID provides benefits like contactless reading and rewritable data, its costs remain higher than barcodes and standards are still being developed.