How the Slide Rule got its Cursor

A new article on my History of Computing site traces the evolution of the straight slide rule over its 3 centuries of service.

Duplex cursor, end of 19th centuryFrom a design perspective this progress is an interesting one to follow because the same basic principle evolves through a sequence of progressively more effective designs, culminating in the familiar form that had helped put a man on the moon in the sixties.

Check it out here!

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