Regardless of how you feel about Facebook, many wonderful vintage computer postings are going there. "At The Controls" is full of vintage computers. Michel Talbot recently posted the MOSAIC Digital Computer (1955). https://www.facebook.com/groups/779220482206901/posts/6728410183954538/ that links to this article: https://espace.library.uq.edu.au/data/UQ_347665/UQ347665_OA.pdf Alan Turing, father of the modern computer 106 pages and this scan of the UK/England's "The Post Office Electrical Engineer's Journal" (their counterpart to the Bell Systems Technical Journal) http://www.samhallas.co.uk/repository/journals/POEEJ/POEEJ%20Vol%2048%20Pt%2... The Post Office Electrical Engineer's Journal POEEJ Vol 48 Pt 2 July 1955.pdf 100 pages page 114-116 MOSAIC - an electronic digital computer Part 1 - The Store and Arithmetic Units good reading! -- jeff jonas