GENERAL KNOWLEDGE
Fitzpatrick, Anne

Computers

(4) K-3 Great Inventions series. This book connects the simple mathematics of counting stones and the abacus with the evolution of increasingly complex calculating methods. Pascal's 1643 mechanical calculator and adding machines are part of the story, as well as transistors and the microchip. The poor, confusing design is compensated for by a brief logical text and better-than-average photos. Reading list, websites. Glos., ind.

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