Radio Frequency Identification (RFID) is a technology used for identification and tracking through radio waves, consisting of a tag with an integrated circuit and an antenna. The document describes the history of RFID, types (active and passive), its current applications in areas such as transportation, animal identification, and inventory management, as well as associated controversies regarding privacy and security. It also mentions the evolution of RFID technology, including miniaturization and the ongoing challenges related to global standards and public acceptance.