RFID is an acronym for Radio Frequency Identification. This technology has innumerable applications and has been in use for many years in many capacities. At its simplest level, it is used to identify objects. Yet, with the addition of sensors, the hardware can be tailored to measure a number of variables in any given scenario. This technology is prevalent in all of our daily lives; for instance, RFID is in the automatic pre-pay meter you might use when driving through a toll area.