The ES-1 was #EvansAndSutherland's abortive attempt to enter the #supercomputer market. It was aimed at technical and scientific users who would normally buy a machine like a #Cray1 but did not need that level of power or throughput for graphics-heavy workloads. About to be released just as the market was drying up in the post-#ColdWar military wind-down, only a handful were built and only two sold.