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A discussion of the most common phone scams, how they work, and how to protect yourself from them.

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.

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.

From BLOG@CACM
#### The Evolution of Computing Power in Switzerland

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

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.

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.

From BLOG@CACM
#### How Do You Calculate on the Abacus?

Considering the use of one of the most long-lived calculating devices.

From BLOG@CACM
#### Discovery: User Manual of the Oldest Surviving Computer in the World

A rare find: the user manual of the oldest surviving computer in the world, the Zuse Z4 relay machine (1945).

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.

From BLOG@CACM
#### Would There Be Computers Without Easter?

Finding roots of computing in the computation of Easter.

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.

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?

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.

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.

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.