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The Calculating Machine from the Concentration Camp
From BLOG@CACM

The Calculating Machine from the Concentration Camp

The story of Viennese engineer Curt Herzstark and the world's smallest mechanical calculating machine, the Curta.

Original Roman Pocket Calculators are Extremely Rare
From BLOG@CACM

Original Roman Pocket Calculators are Extremely Rare

As far as we know, only three or four original specimens of the Roman hand abacus have survived.

Patent Protection in Europe
From BLOG@CACM

Patent Protection in Europe

Up to the second half of the 19th century —with the exception of the industrial power Great Britain—the protection of inventions was inadequate and strongly disputed...

Computers Were Originally Humans
From BLOG@CACM

Computers Were Originally Humans

Until the middle of the 20th century, computers were in fact humans who performed calculations.

How Does One Divide with Napier's Rods?
From BLOG@CACM

How Does One Divide with Napier's Rods?

Napier's multiplication and division rods, deriving from the basic multiplication table, simplify calculations considerably.

How Does One Multiply with Napier's Rods?
From BLOG@CACM

How Does One Multiply with Napier's Rods?

Napier's multiplication and division rods, deriving from the basic multiplication table, simplify calculations considerably.

How Does One Calculate With A Circular Slide Rule?
From BLOG@CACM

How Does One Calculate With A Circular Slide Rule?

The circular slide rule was widely used until the 1970s.

The Evolution of Computing Power in Switzerland
From BLOG@CACM

The Evolution of Computing Power in Switzerland

Milestones in the history of computing from the Swiss National Supercomputing Center, Lugano.  

Soresini: A Very Rare Book on the History of Computing
From BLOG@CACM

Soresini: A Very Rare Book on the History of Computing

The work is an extremely instructive, rich history of calculating technology. It also includes the analog world and automata, and is written in Italian.

Charles Babbage and the Loom
From BLOG@CACM

Charles Babbage and the Loom

Babbage wanted to control his analytical engine, regarded as the ancestor of the modern-day computer, with punched cards.

The World's Most Magnificent Historical Calculating Machines
From BLOG@CACM

The World's Most Magnificent Historical Calculating Machines

The design of today's electronic computers is usually not very appealing, in contrast to magnificent mechanical calculating machines from earlier times.

The World's Most Magnificent Historical Automatons
From BLOG@CACM

The World's Most Magnificent Historical Automatons

Automatons are ubiquitous. Some of the most magnificent works in the genre have survived in museums.

When Did the Digital Age Begin?
From BLOG@CACM

When Did the Digital Age Begin?

There is no clear answer.
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