Presentation given by Butler Lampson (introduced by Ed McCreight) at the ACM Conference on the History of Personal Workstations, held at Rickey’s Hyatt House in Palo Alto, California, on January 9 and 10, 1986. The conference was sponsored by the Association for Computing Machinery (ACM) and hosted by the Xerox Palo Alto Research Center (PARC).

Source: https://youtu.be/h33A-KWJKDQ