Transcription: The mainframes were actually connected, there were four places in the world, MIT, Stanford, University of Utah and the University of Minnesota. And these were not traditional television screens. These were more like big oscilloscopes. They call them vector displays as opposed to raster displays. they were very easy to program games which were very, very simple because you could draw vectors but as you drew more and more of them the refresh time would slow down and all of a sudden it'd start to flicker. So as long as you kept the number of objects you were drawing to a small number you'd get go ...
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