Re: [COFF] [TUHS] AP-3 minicomputer

Dan Cross &lt;crossd(a)gmail.com&gt; writes: The 1704689 flip-flop PCB is a Bendix part: https://www.ebay.com/itm/263975518840 This page has a picture of a "Nistri-Bendix AP/3 analytical stereoplotter (a special purpose instrument primarily used to compile contour maps and terrain profiles)", which sounds like the kind of thing the Air Force would have: https://www.cia.gov/library/center-for-the-study-of-intelligence/kent-csi/v… There's more information online about the AP/1, AP/2 etc., which consist of a digital computer driving some specalised plotting hardware -- so it sounds like the letter's talking about spares for the computer part of the AP/3. Whether that's the same as the AP-3 you're after, though... -- Adam Sampson &lt;ats(a)offog.org&gt; <http://offog.org/>