I have a duplicate copy of "The Computer Technician's Handbook", by Brice Ward, TAB No. 554, 1971. The first half of the book is a convetional treatment of basic digital logic theory, logic families, and such, with an emphasis on the 8200 series. The second half of the book is more interesting. It is a "case study" of the Computer Automation PDC 808, complete with a description of the architecture, logic diagrams, a detailed walkthrough, timing diagrams, scope waveforms, etc. Much of it looks like it was probably lifted from the manufacturer's service manuals. The PDC 808 was an 8-bit minicomputer (yes, 8-bit) introduced in 1968. It appears to have a family resemblance to the 16-bit PDC 816, and more closely resembles the traditional 16-bit "stretched PDP-8" minicomputer style rather than most of the later 8-bit architectures seen in microprocessors. The bookseller rated this book in "very good" condition. It is clean with a tight binding, with some wear on the cover and a small crease. I paid $7.00 for it. I'll sell it for that plus shipping. --Bill