The Abacus: The World's First Computing System: Where it Comes From, How it Works, and How to Use it to Perform Mathermatical Feats Great and Small
by Jesse Dilson
The abacus is as useful and effecient a machine today as it was when it was first created centures ago. Whether you're an expert in the latest computer technology or you're mastering arithmetic and word problems for the first time, it won't take long to learn the basics (and even the not-so-basics) of adding, subtracting, multiplying, and dividing on this ingenious and fun...more
Paperback, 160 pages
Published March 15th 1995 by St. Martin's Griffin
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A fascinating explanation of how to use an abacus and it's history. Everyone in the modern world should read this. It will give you an appreciation of a lot our technology that we take for granted. It will also instill in you the fact that we are not "smarter" than our predecessors. We are standing on the shoulders of their inventions and technology.