VERY RARE - DSP Designer Manual, Version 1.2 Rev. D, by Zola Technologies, Inc. DSP Designer was a powerful environment for developing digital signal processing algorithms and software. The foundation for this environment was MPW (Macintosh Programmer's Workshop), and DSP Designer was a set of tools and scripts which expanded the basic MPW environment. See Table of Contents in pics.
The book has two parts: Part 1 (Chapters 1, 2 and 3) is the manual itself (134 pages), and Part 2 (see cover pics) is the Command Reference (128 pages). The manual is in excellent condition since it was never used. No missing pages, no stains anywhere.