Already in 1976 Seymour Cray starts research and development towards the Cray-2 supercomputer. The machine is supposed to be ten times faster than its predecessor Cray-1, which didn't work out for several reasons. Of the followup model Cray-3 even only one unit got sold, but never paid, because it never worked as promised.
This talk is the fourth talk of a sequel about life and work of Seymour Cray. Main focus of the talk are challenges during development of the Cray-2 supercomputers, one of the latest of its kind.