<div dir="ltr">A couple of years ago, there was a working 1620 at the IBM museum in Sindelfingen, Germany (since moved to Böblingen) that they had been loaned by a museum in Italy - I've lost the name of the latter. The IBM group was allowed to borrow it for five years, and only once. They were sad to see it go back. But it's good to know there are a couple out there. <br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Mar 3, 2016 at 9:21 AM, Ceruzzi, Paul <span dir="ltr"><<a href="mailto:CeruzziP@si.edu" target="_blank">CeruzziP@si.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><a name="1216800251__MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">The 1620 had very few logic circuits; it looked up sums in a table instead. It’s nickname was “CADET”: “can’t add; doesn’t even try!”
There is a 1620 preserved at the American Computer Museum in Bozeman, Montana. A few years ago, Ted Hoff was given an award by the museum. As he walked by the 1620, he remarked that had used one, and that the machine’s creative use of memory in place of logic
convinced him that it would be possible to create a processor on a sliver of silicon—what became the Intel 4004.
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Paul Ceruzzi<u></u><u></u></span></p>
<p class="MsoNormal"><a href="mailto:ceruzzip@si.edu" target="_blank"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0563c1">ceruzzip@si.edu</span></a><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><a href="tel:202-633-2414" value="+12026332414" target="_blank">202-633-2414</a><u></u><u></u></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Members [mailto:<a href="mailto:members-bounces@lists.sigcis.org" target="_blank">members-bounces@lists.sigcis.org</a>]
<b>On Behalf Of </b>Murray Turoff<br>
<b>Sent:</b> Thursday, March 3, 2016 12:06 PM<br>
<b>To:</b> Mounier Kuhn <<a href="mailto:mounier@msh-paris.fr" target="_blank">mounier@msh-paris.fr</a>><br>
<b>Cc:</b> members <<a href="mailto:members@sigcis.org" target="_blank">members@sigcis.org</a>><span class=""><br>
<b>Subject:</b> Re: [SIGCIS-Members] IBM 610<u></u><u></u></span></span></p>
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<p class="MsoNormal">Ahhh! I worked on the IBM 1620 for IBM in san jose for a year 1960-1961.<u></u><u></u></p>
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<p class="MsoNormal">It was a "personal computer" about the size of a desk. It had a continuous memory
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<p class="MsoNormal">and you could set up the word length you wanted. Memory was based upon our standard<u></u><u></u></p>
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<p class="MsoNormal">digital system to the base 10. At that point in time there was only three machines at<u></u><u></u></p>
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<p class="MsoNormal">the San Jose plant and a group of us were working on applications. I wrote a guide to<u></u><u></u></p>
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<p class="MsoNormal">machine level programming and debugging and worked with others on a Fortran System as well
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<p class="MsoNormal">a numerical control application package. It was a fun machine to work with.<u></u><u></u></p>
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At the San Jose plant a lot of sales people were brought in to be educated in new but not yet<u></u><u></u></p>
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<p class="MsoNormal">released products. They always sang IBM songs to start the meeting. I think somehwere i have<u></u><u></u></p>
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<p class="MsoNormal">burried an IBM song book. They were extremely loyal as some them were with IBM in 1929 and
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<p class="MsoNormal">it was only IBM and ATT that did not fire any professional during that recession. Many had nothing much<u></u><u></u></p>
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<p class="MsoNormal">to do so they started a song writing contest which resulted in the song book. I have never checked
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<p class="MsoNormal">if the song book is online anywhere.<u></u><u></u></p>
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