... server (definition 2).Data valueMaskResulting value 11 010 1 01 AND 0 011 111 100 010 1 01 mainframe MAN326Mmainframe n. A type of large computer system (in the past often water-cooled), the primary ... operator (AND, OR, XOR, or NOT) to combine the mask and the data value. For exam-ple, the mask 0 011 111 1, when used with the AND opera-tor, removes (masks off) the two uppermost bits in a data value ... inter-faces between mainframe computer systems and wide area networks. See also computer, mainframe computer, microcomputer, supercomputer, wide area network. Com-pare midrange computer, workstation...