LISSAJOUS FIGURES by Stephen Keevil from Sinclair Programs, July 1983 A LEVEL physics students should find useful LISSAJOUS which was written by Stephen Keevil of Dulwich, London for the 16K Spectrum. The program is designed to draw graphs representing the mathematical relationship existing between pairs of sinusoidal waveforms. It is self-explanatory and contains a simplified explanation of the principles involved. Keevil adds that good examples of Lissajous figures will be obtained with a frequency of 1:1 and various values of phase angle.