000			00362nam a2200145Ia 4500
008			231217s9999 xx 000 0 und d
041			_aEnglish
082			_a001.642 HAN;5
100			_aHansen, Per Brinch
245		0	_aOperating system principles
260			_c1990 _bNew Delhi : PHI,
300			_axviii+336
650			_aOperating systems
942			_cAA
999			_c162350 _d162350