Abstract: An electronic device for use as a communications terminal including means for determining a location of the electronic device, means for storing that location in the electronic device, means for receiving a wide-area broadcast, and means for executing location-specific instructions contained within the wide-area broadcast, responsive to the stored location. The invention further comprises a method for delivering a data channel signal having a plurality of location-dependent instructions, from a transmitter to a plurality of receiving units. The method comprises the step of transmitting the data channel signal to the plurality of receiving units. Once received by a particular receiving unit, the particular receiving unit identifies and executes location-dependent instructions within the data channel signal which correlate with the location of the particular receiving unit as stored in that receiving unit.

Abstract: A radio response system including a broadcast station, a satellite relay, a processing center, and a plurality of user terminals. Each user terminal has a broadcast receiver, a communications interface device, a controller and a data transmitter. The broadcast station broadcasts a program signal. The broadcast receiver receives the program signal. The communications interface device communicates the program signal to a user. The controller generates a user-data signal from identification information transmitted in connection with the program signal and/or timing, location and frequency information needed for identifying the program signal, and a user-input signal generated in response to the program signal. The data transmitter transmits the user-data signal at a carrier frequency as a transmitted-data signal. The satellite relays the user-data signal to the processing center.