00:00a miracle calculator that no one could understand for 77 years kurt a developer imprisoned in a
00:06nazi concentration camp never once drew a blueprint entirely in his mind he conceived a calculator
00:11no larger than five centimeters across over 600 parts packed together with no electricity required
00:18the calculator incorporated a one-of-a-kind mechanism as each digit rolled over the number
00:23of teeth shifted automatically and carrying the carryover between digits was handled entirely
00:29on its own and it didn't stop at simple addition subtraction multiplication and division it could
00:34even calculate square roots this extraordinary design is regarded as the ultimate achievement
00:40in mechanical engineering
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