Sold to someone out there for $358 Is there an archive of The Western Electric Engineer journal online anywhere? In the July 1977, Volume 21, Number 3 issue there is a 7 page article "MAC-8: A Microprocessor for Telecommunication Applications", by Herbert H. Winfield". which provides a good architectural overview of the MAC-8 for those that are interested. Several years ago I found that the University of Minnesota Libraries had that issue in their collection and they were able to provide a photocopy on request for a minimal charge to cover processing and copyright expenses. From a quick glance at their website now it's not obvious if they still provide that service, and still have that journal in their collection.