Links of Interest

Slide Rules Dutch Circle of Slide Rule Collectors. The Oughtred Society. History of the Slide Rule. Napier's Rods, Abacus and Slide Rule. The Death of the Slide Rule. Giovanni Breda's Slide Rule Collection

Great educational websites Davids Math Pages. LearnAbacus. The Chinese Abacus. How to use an Abacus. Curta Simulation. Yet Another Curta Simulator. Soroban: Mystery of the Bead (pdf).

History of Calculating Machines Early Calculators. A Brief History of Mechanical Calculators. The Mind Machine Museum Lots of Links. Mathematisches Maschinen-Museum.

On the History of Computers History of Computers. The First Computer. The Machine that changed the World. Charles Babbage Institute. History of the Integrated Circuit. History of Computer Science. The Life and Work of Konrad Zuse. Rechnerlexikon - Encyclopaedia. History of Home Computers.

Great Calculator Collections The List of Famous Calculator Collectors. The X-Number World. Datamath Calculator Museum. Jay M. Goldman Office Machines. Welcome in the big world of small calculators. Kees Nagtegaal's mechanical calculator collection. Old Calculator Museum. Nathan's Possibly Interesting Website. New website of Andre Devaux. Wim Hasselo's marvellous website. Cris's new and enjoyable website.

Documentation on Calculating Machines Die Rechenmachinen (pdf English). (Complete OCR copy of the German standard work: Die Rechenmachinen und ihre Entwicklungsgeschichte translated into English.)