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Archives: Portfolio

A portfolio type for featuring items in your portfolio.

Stephens’ “Supremathic”

Portfolio 1

A completely different circular slide rule

 El Calculador!

Portfolio 3

A Spanish multiplication aid

Glass and Paper?!?

Portfolio 5

The ALKU glass slide rule

Homemade hydrological slide rule

Portfolio 7

Handcrafted with amazing workmanship

Enter the Altair!

Portfolio 9

And the rest is history…

A bill full of holes

Portfolio 11

An electricity bill from the mainframe era

A Victorian “Calculator”

Portfolio 13

A must-have for the enterprising farmer!

Software by the yard

Portfolio 15

Punched paper tape storage

Chenevier’s memento

Portfolio 17

An unusual pocket reference from the 19th century

Fowler’s Universal Calculator

Portfolio 19

A circular slide rule from Manchester

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