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Remarks on simulation of Boolean functions

Recently M. Morris Mano presented a method for performing Boolean OR, AND and NOT operations by means of arithmetic and conditional transfer operations in a decimal computer lacking builtin logical instructions [1]. When A, B, C are variables whose defined value is 0 or 1 and a, b, c are the corresponding integer variables with values 0 or 1, his Boolean OR was defined by: “The result of an OR operation of Boolean variables is the same as the arithmetic addition of the a, b, c integer variables after which the following test is made: (a) If the sum is equal to zero, the result is correct; (b) If the sum is larger than zero, the answer is 1.”

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