000			00491nam a2200157Ia 4500
008			231221s9999 xx 000 0 und d
041			_aEnglish
082			_a001.642 DEI
100			_aDeitel, Harvey M.
245		3	_aAn Introduction to operating systems: Including case studies in unix, OS/2, MS-DOS, macintosh, UM,MVS, open systems
250			_a2nd ed.
260			_c1990 _bPearson Education (Singapore) _aDelhi
300			_axxvi+853
650			_aoperating,systems
942			_cBC
999			_c201976 _d201976