<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Darius,<div><br></div><div>Interesting! Might you also have data on when IMPs were installed and removed at Tinker AFB near Oklahoma City and McClellan AFB near Sacramento?</div><div><br></div><div>Thanks,</div><div><br></div><div>Steve<br><br><div id="AppleMailSignature" dir="ltr">Sent from my iPhone</div><div dir="ltr"><br>On Jul 22, 2019, at 3:18 PM, Darius Kazemi <<a href="mailto:darius.kazemi@gmail.com">darius.kazemi@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div dir="ltr"><div dir="ltr"><div>Hi,</div><div><br></div><div>I've been reading the list archives for a while (it helps for the <a href="https://write.as/365-rfcs/365-ietf-rfcs-a-50th-anniversary-dive">early RFC blog project</a> I'm doing), but I didn't have a reason to join and post until today.</div><div><br></div><div>I saw Karl Auerbach's message from back in March asking about the SDC IMP, along with Alex McKenzie's answer.</div><div><br></div><div>Karl Auerbach's question: <a href="http://mailman.postel.org/pipermail/internet-history/2019-March/005175.html">http://mailman.postel.org/pipermail/internet-history/2019-March/005175.html</a></div><div>Alex McKenzie's answer: <a href="http://mailman.postel.org/pipermail/internet-history/2019-March/005174.html">http://mailman.postel.org/pipermail/internet-history/2019-March/005174.html</a></div><div><br></div><div>I spent four days at the Charles Babbage Institute last month and among the records I was looking at were the library's collection of Alex McKenzie's documents. In this collection I found a folder called "Installation History of first ARPANET Interface Message Processor (IMP) and Terminal Interface Message Processor (TIP) 1969 - 1976" (<a href="https://archives.lib.umn.edu/repositories/3/archival_objects/49539">CBI record</a>).</div><div><br></div><div>The document is a four-page document dated October 1977 that lists every known IMP/TIP at the time, when it was installed, and its history of moving between sites (if any).</div><div><br></div><div>What the document says is that the SDC IMP was installed on April 20th, 1970. A footnote says that it was there until 1976, when it was moved to a site called ISI, which I assume is the USC Information Science Institute. It appears that by 1977 it had been reassigned a Network ID Number of 52.</div><div><br></div><div>I have photographs of the IMP installation schedule and if anyone is interested I can send them along. I don't know what the etiquette of posting them to this list is; I currently only have clearance from CBI for private usage but it's unclear to me whether this (private) list counts as private usage.</div><div><br></div><div>-Darius<br></div></div>
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