Actually, when I arrived in Berkeley, by a lucky incident I stumbled into the Exploratorium, where the Cybernetic Serendipity show just had arrived, and I spent a whole afternoon, a single person, nobody else but me, in these rooms.
Hans Dehlinger, The 1970s Artist-Programmer: Truckenbrod, Dehlinger
In Berkeley, it was called the three-dimensional IBM punch card, and it was in the fifth basement because it was bomb-secure, and you never saw it.
Hans Dehlinger, The 1970s Artist-Programmer: Truckenbrod, Dehlinger