After Otaru, Chiba, and his brother has found the work with calculators, electrical jobs in Show Business. At one time, Ginza, Tokyo in 1949, they added another revenue opportunity to spot sales also terminated the hotel WA vertical bar. By building on their calculator. Most of the calculators at that working with gear and used by hand or motor rotation. Chiba, who is OMI knowledge of electronics to come? Thus began to devise a calculator using the winding dirt sorak aya. Size calculator desk creates success in 1954, such as calculators, work with mechanical power mixed with Japan's first machine. One important innovation in his calculator is adapted for Panel, just 10 buttons from the original with all the major figures (such as the main unit, it has a 1-9-90, 10 tens, there are hundreds, is 100-900, etc), and another novelty is the discount window to display a single channel vs. other machines that have three channels (including a slot for a two channel output area).
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