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bit map -- Definition

A bit map is a string of bits in which each bit has a symbolic, rather than
numeric, value.

See Also

bit,
byte,
Programming COHERENT,

Notes

C permits  the manipulation of bits  within a byte through  the use of bit-
field routines.   These generate code  rather than calls  to routines.  Bit
fields  are  generally  less efficient  than  masking  because they  always
generate masking and shifting.