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The World's Largest Commercial Cylindrical Slide Rule has a Scale Length of 24m
From BLOG@CACM

The World's Largest Commercial Cylindrical Slide Rule has a Scale Length of 24m

The world's largest mass-produced cylindrical slide rules come from Loga-Calculator AG in Zurich/Uster, Switzerland.

Would There Be Computers Without Easter?
From BLOG@CACM

Would There Be Computers Without Easter?

Finding roots of computing in the computation of Easter.

Why Is There No Well-Known Swiss IT Industry?
From BLOG@CACM

Why Is There No Well-Known Swiss IT Industry?

Herbert Bruderer asks why no information technology industry emerged in Switzerland in the 1950s, despite the appearance of computers from several sources.

Calculating With Roman Numerals is Not So Difficult
From BLOG@CACM

Calculating With Roman Numerals is Not So Difficult

How to deal with Roman numerals and without a sign for zero in an additive number system, if no hand abacus is available?

More Replicas of Historical Calculating Machines Found
From BLOG@CACM

More Replicas of Historical Calculating Machines Found

Documenting the discovery of several previously unknown replicas of historical computing devices made by Roberto A. Guatelli.

The Model Maker of Leonardo da Vinci, Blaise Pascal, and Charles Babbage
From BLOG@CACM

The Model Maker of Leonardo da Vinci, Blaise Pascal, and Charles Babbage

Discovery of a previously unknown replica of the legendary Swiss Millionaire calculating machine at Carnegie Mellon University in Pittsburgh, PA.

Did Albert Einstein Calculate on the 'Millionaire' in Zurich?
From BLOG@CACM

Did Albert Einstein Calculate on the 'Millionaire' in Zurich?

In 1897, ETH Zurich was the first university in the world to have a copy of the legendary four-species calculating machine Millionaire.
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