This topic primarily discusses the societal impact of Information Theory, Signal Processing, Communication Theory, and Machine learning, by considering some particular application areas, especially those which rely on the fundamental and important fast Fourier Transform algorithm. The applications chosen are intended to be familiar, but far from being exhaustive. The topic considers how the performance of the solutions in some applications have changed over the past couple of decades. The purpose of this video is to further motivate the context of the course, and to specifically look at processing and communications of signals from sensors. The viewer is encouraged to continue the conversations raised in this video, through the discussion board, or in hybrid seminars.