George Nelson was a design consultant for Olivetti (Ivrea, Italy) from 1965 until 1971.  The collaboration, as one source maintains, quite possibly came about on the recommendation of Ettore Sottsass, who was employed by Nelson for a few months in 1956, and worked for Olivetti in Italy.

Programma 101 movable computer desk
Programma 101 movable computer desk, 1967
Editor 2 electric typewriter
Editor 2 electric typewriter, 1968
John Svezia
With the Editor 2, Olivetti-Underwood (New York, New York) attempted to get a foothold in the American market. Among other things, the designers concentrated on the size and appearance of the keys.
Studio 45 and Studio 46 portable typewriters
Studio 45 and Studio 46 portable typewriters, 1968
Sycor typewriter terminal
Sycor typewriter terminal, 1969
DE520 video display terminal
DE520 video display terminal, 1970