A system that includes a Radio Frequency Identification (RFID) tag reader, said reader includes a reading section, a processing section, memory and a transmitting section; wherein the reading section is configured to read tag data stored on one or more RFID tags, the processing section is configured to process this data and the transmitting section is configured to transmit the result as transmitted data; such that the transmitting section is also configured to transmit updated tag data to the or each of the RFID tags, said updated tag data replacing some or all of the tag data stored on the RFID tag to be updated. The system further includes one or more RFID tags, an intermediate database and a customer database such that the intermediate database is configured to receive the transmitted data, convert it into intermediate data, which is in a format accepted by the customer database, then transmit this to the customer database.