Topic summary
Imlac PDS-1
Extracted from the Wikipedia article IMLAC.
Pixels replace vector displays
Imlac PDS-1's at Xerox PARC impressed them with its interactivity and graphics, but its ugly text prompted Chuck Thacker to develop the experimental bitmapped Xerox Alto machine in 1973, a decade before that much memory was affordable for non-research single-user machines. The Alto led to the GUI revolution.