Speedpass was a keychain radio-frequency identification (RFID) device introduced in 1997 by Mobil for electronic payment. It was originally developed by Verifone. By 2004, more than seven million people possessed Speedpass tags, which could be used at approximately 10,000 Exxon, Mobil and Esso gas stations worldwide.
Speedpass
Speedpass with Spanish pieces of eight
Radio-frequency identification
Radio-frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects. An RFID system consists of a tiny radio transponder called a tag, a radio receiver, and a transmitter. When triggered by an electromagnetic interrogation pulse from a nearby RFID reader device, the tag transmits digital data, usually an identifying inventory number, back to the reader. This number can be used to track inventory goods.
FasTrak, an RFID tag used for electronic toll collection in California
RFID hard tag
Electronic key for RFID based lock system
RFID antenna for vehicular access control