The early 20th century saw the beginning of modern radio communication. The convegence of radar with the ability to broadcast radio led to the idea for Radio Frequency Identification. Even though one of the first papers exploring RFID was written in 1948, it would take the development of other technologies before RFID could become practical. One of the first commercial applications was electronic article surveillance (EAS) as a way to curtail theft. The possibility of using RFID as a tracking device led many companies to build systems for this purpose. The desire by highway transportation authorities to see traffic move quicker through toll booths saw the invention of electronic toll collection systems and the need to limit access to certain areas also drove the development of RFID.