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Archives: Portfolio

A portfolio type for featuring items in your portfolio.

Otis King’s calculator

Portfolio 1

Compact precision at its best

An arithmetical ruler

Portfolio 3

A simple but nifty calculation aid

Steward’s M.T. Slide rule

Portfolio 5

Thoroughly confusing!

The Bassett Adder

Portfolio 7

Compact, lightweight, and a pleasure to use

Vizzini’s Calculating Table

Portfolio 9

A minimalist calculator from Italy

A cheater’s slide rule

Portfolio 11

A relic of past dishonesty

Mario Loffredo’s elastic calculating scale

Portfolio 13

A lost precursor of the Gerber Variable Scale

Other worlds than ours

Portfolio 15

A 19th century take on Exobiology

Shrinking Megabytes

Portfolio 17

Evolution of the Hard Disk

The Sliding Gunter

Portfolio 19

A fascinating transitional device

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