It is probably safe to say that every member of LMR is interested in machines that interact with their environment. Interacting with the environment means getting information from it to provide feedback to the machine. In the electronics and computer worlds, "information" means "signals." And since most of our robots use digital signals, whether with discrete logic chips or some sort of computer, and our machines need to do some sort of processing on those signals, we all need to be familiar with Digital Signal Processing (DSP). One note before we go on.