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This document is a reproduction of the second printing of this book, published by Digital in July 1978. Although I have proof-read this, there may still be errors remaining. If you find one, please tell me!
I have created this version of the document from the scans available on David Gesswein's PDP-8 Site.
I have not completed Appendix A, which contains diagrams of individual circuits. (In fact, I've not decided whether it is worth doing it).