Radiofrequency identification (RFID) technology or proximity cards is a wireless communication technology that is used to track individual items and collect all the information related to them. The technology known as the Internet of Things (IoT) is used to automatically link things to the world by using RFID or proximity cards and makes it possible to create new ways of working. It is a technology that uses radio waves to identify the tagged object. Several industrial and commercial applications are used to track the items and maintain the supply chain till they reach the destination. RFID and Proximity cards are now well-known and popular names in the digital world. But do you know that this technology has been used for ages? In 1945, Léon Theremin was the first who develop the first RFID which uses radio waves to track the presence of any object. However, later in the 1970s, the technology was modified and Charles Walton invented the first passive RFID tags.