Lissajous figures are primarily used to compare amplitudes, frequencies, and phase differences between two oscillatory signals, particularly when displayed on an oscilloscope. When two sinusoidal signals of equal amplitude and frequency are analyzed, their phase relationship can be visualized through the shape of the trace; a straight line indicates in-phase signals, while a circle suggests a phase difference of pi/2. The discussion highlights the limited awareness of other practical applications beyond visual representation in electronics. Overall, Lissajous figures serve as a valuable tool in signal analysis and visualization. Their relevance extends beyond the ABC logo, emphasizing their scientific utility.