Dictionary:Binary-coded decimal (BCD)

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A number system code in which decimal digits are represented by four binary digits (see Figure N-4). For example, in the BCD number 0010 0111, the 0010 represents 21×10=20 and the 0111 represents 22+21+20=7, giving the decimal number 27. The excess-three code (BCDXS3) is the BCD number plus 0011 (three).

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Binary-coded decimal (BCD)
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