An area of memory on an RFID (Radio-frequency identification) microchip that is assigned to a particular type of information: Data fields may be protected or they may be written over, so a data field might contain information about where an item should be sent.

The ability to prevent data stored in a specific area of memory of an RFID (Radio-frequency identification) microchip from being overwritten: Some companies use the data field protection device to store an Electronic Product Code, which doesn't change during the life of the product it's associated with.