RFID

• It’s 8 o’clock and you’ve just arrived at work, with just enough time to have a coffee. You’re out of luck. This morning, as usual, there are no cups left in the dispenser. With RFID, this situation will soon become a thing of the past because your supplier will be notified as soon as the machine reaches the minimum quantity of cups.
• Radio Frequency Identification (RFID), or Radio-identification, is a technology that provides a unique identifier for data at a distance via radio waves.
• An RFID system is made up of an “RFID tag” or “interrogator” and one or more “readers”. The reader and the interrogator communicate by the emission of a magnetic field without any physical connection.

"Red Book : RFID"