RFID has long Performance life, long reading distance, data on label encrypting, great capacity, and stored information free altering. It may replace the bar code and magnetic needles.

In the 1830s, the British team of Cooke and Wheatstone developed a telegraph system with five magnetic needles that could be pointed around a panel of letters and Numbers by using an electric current.

Imitating the physics model of ideal magnetic pole, magnetized needles are modeled on many thin soleniodal circuits of molecular el…