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In computer programming the punched cards uses the binary numbers instead of the letters.
A = 1. B = 2. C = 3. D = 4. E = 5. F = 6. P = 16. U =21. Z = 26. The binary equivalent of the number code of letters in binary, such as:
A = 00001, B = 00010, C = 00011, p = 10000, Z = 11010.
Yes = 1 and No = 0
