If you are
talking 1960's I think the real answer is "not much".
No, not true. The only one of the big makers that I can think of that
(to my knowledge) did *not* have some sort of graphics unit available
was Burroughs - and I would be happy to be corrected on that.
Mind of course if you go back earlier many
machines used CRTs as Williams
Tubes for Primary Storage , and certainly on the Original Manchester SSEM or
Baby the store content was visible.
I assume they mean some sort of video unit for interactive (or
Burroughs seems to have made a number of text and graphic displays, for
their D825 machines: