000			00316nam a2200133Ia 4500
100			_aDeitel, Harvey M
020			_a0-201-50939-3
250			_a2nd ed
942			_cBK
245			_aAn Introduction to operating system
260			_aAddison-Wesley, Massachusetts _c1990
082			_a001.61 Dei
300			_axxvi,853
999			_c24322 _d24322