...into a mouse and windows based user interface. This is obviously the biggest single jump in the entire set of photographs, and the place where Hertzfeld most wishes that Atkinson had dated the shots. It's tempting to say the change was caused by the famous Xerox PARC visit, which took place in mid-December 1979, but Atkinson thinks that the windows predated that, although he can't say for sure.
This particular picture shows different fonts in overlapping windows, but there was no window manager yet, so they couldn't be dragged around.
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