The tape was from the collection of the Computer History Museum, inherited from the collection of their predecessor, the Computer History Museum in Boston. It had just never been digitized. There&#x27;s a blog post on it here: <a href="http:&#x2F;&#x2F;www.computerhistory.org&#x2F;atchm&#x2F;the-1986-acm-conference-on-the-history-of-personal-workstations&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.computerhistory.org&#x2F;atchm&#x2F;the-1986-acm-conference...</a>