The Japanese Abacus

By Takashi Kojima. 102 pages. "SIMPLE and primitive though it seem, the Japanese abacus is capable of amazing speed and accuracy. In numerous tests it has outclassed the best electric computers of the Western world. Here for the first time in English is both an explanation of the mystery and a complete book of instructions for the use of this amazing pocket calculator. The simplicity and clarity of Mr. Kojima's text now make it possible for you to learn the basic principles in a single reading--much more easily than you could learn say, the slide rule--and with practice of the graded exercises become an abacus expert in your own right."--from the back cover.