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・ big-endian
・ big-lan
・ bigloo
・ bignum
・ bigot
・ bijection
・ bill gates
・ bill joy
・ binaries
・ binary
binary coded decimal
・ binary compatibility standard
・ binary counter
・ binary data
・ binary exponential backoff
・ binary file
・ binary large object
・ binary package
・ binary search
・ binary synchronous transmission


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binary coded decimal : FOLDOC
binary coded decimal
(BCD, packed decimal) A number representation where a number is expressed as a sequence of decimal digits and then each decimal digit is encoded as a four-bit binary number (a nibble). E.g. decimal 92 would be encoded as the eight-bit sequence 1001 0010.
In some cases, the right-most nibble contains the sign (positive or negative).
It is easier to convert decimal numbers to and from BCD than binary and, though BCD is often converted to binary for arithmetic processing, it is possible to build hardware that operates directly on BCD.
[Do calculators use BCD?]
(2001-01-27)



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