The instruction booklet describes a two-diskette package "for the study and application of Fourier analysis" (introduction, p. v).
The software and booklet, written by Scott Stevens, is designed to run on an Apple II-plus with 48K memory. 'Game paddles must be in use when using either of these diskettes. Failure to install the paddles will result in a "crash." '
The booklet provides explanatory information, a range of graphs, and detailed instructions on using the accompanying mathematical software package.