IMLAC Corporation was an American electronics company in Needham, Massachusetts, that manufactured graphical display systems, mainly the PDS-1 and PDS-4, in the late 1960s and 1970s.

The PDS-1 debuted in late 1969 at that year's Fall Joint Computer Conference. It was the first low-cost commercial realization of a highly interactive computer graphics display with motion. The PDS-1's initial selling price was $9450