Radio Data System

Radio Data System is a communication protocol that allows to send small amounts of digital information in a common FM radio broadcast. Aside from time and date, this commonly is the name of the station, or information about the program that is currently broadcast. First tests were done in 1983 and 1984, the standard was officially introduced in 1988. 
The following types of information can be sent:
It is possible to transmit Radio Text. In theory, it is possible to transmit 64 characters per line.