Want IBM 400-series account machine

William Donzelli aw288 at osfn.org
Tue Mar 1 22:24:15 CST 2005

> Still, gotta love stuff that automates calculations with purely mechanical
> methods (well, except for the 604) and uses punch cards.  It's basically
> the 20th century version of the Babbage engine.

Well, electromechanical, as the unit record machines used relays,
solenoids and thyratrons a fair amount.

Still very neat-o.

William Donzelli
aw288 at osfn.org

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