Electrically Erasable Programmable Read Only Memory (EEPROM): stores small amounts of memory

Radio Frequency: a frequency within the range of radio transmission, from about 15,000 to 10¹¹ cycles per second

Radio Waves: an electromagnetic wave having a wavelength between 1 mm and 30,000 m, or a frequency between 10 kilohertz and 300,000 megahertz

Static Random Access Memory (SRAM): semiconductor memory; retains content as long as power is applied

Subcutaneous: lying under the skin; introduced under the skin by injection

Transceiver: a transmitter and a receiver combined in one unit

Transponder: a device that transmits a reply to the reception of a certain (radio/radar signal)

UPC Code: Universal Product Code, bar code