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Rare Circular Slide Rules
From BLOG@CACM

Rare Circular Slide Rules

Slide rules: the longer the scale, the greater the accuracy of the instrument.

The Colossus
From BLOG@CACM

The Colossus

Unseen images of the code-breaking computer that helped win World War 2.

Digitization Puts Many at a Disadvantage
From BLOG@CACM

Digitization Puts Many at a Disadvantage

Digitization has many downsides.
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