You use it to program/run a Software Defined Radio (SDR). SDR makes radios cheap, versatile and programmable. As a non-licensed radio operator you can get a ch

You use it to program/run a Software Defined Radio (SDR). SDR makes radios cheap, versatile and programmable. As a non-licensed radio operator you can get a cheap USB connected receiver and use GNU radio to receive, demodulate and decode all sorts of signals. It's fun to learn about how to decode certain signals. You start with a simple AM demodulator to listen to music stations and before you know it you're tracking airplanes and hacking keyfobs.