Schematics of Atanasoff-Berry Computer logic circuits?

[William Donzelli]

>  Where I think he really shown on the ENIAC however, was in
>  getting the level of reliability he did out of the components
>  of the day.  My understanding is that it was one of the
>  earliest applications of worst-worst design and of derating
>  the tubes, running them at lower filament and plate voltages
>  than normal, to extend their lives.

The Phone Company also did this - and were the other place where one
could find huge numbers of tubes used reliably - but they were such a
secret society that the knowledge never really got out.

--
Will