In the judgment of design engineers, the ordinary means of communicating with a computer are entirely inadequate. [...] Graphical communication in some form or other is of vital importance in engineering as that subject is now conducted; we must either provide the capability in our computer systems, or take on the impossible task of training up a future race of engineers conditioned to think in a different way.

Sect. 4: Design and Assembly - "Computers Then and Now" (1968)