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Last updated: 24 November 2023: David Green


The First Generation

The Pilot ACE

The English Electric DEUCE

The Bendix G15

Numerical Control on the Bendix G-15D at Northrop Aircraft, by Max Brown

The Sydney University SILLIAC

Hair planimeters

Hatchet planimeters

Early Amsler planimeters

Willis and Lippincott planimeters

Coffin planimeters

The New Improved Slideing Rule

A timber merchant's Rule?

Barker Family

Truscott Family

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