000			00349nam a2200145Ia 4500
008			220926s9999 xx 000 0 und d
100			_aCharles Crowley
245		0	_aOperating Systems
250			_a4th RP
260			_aNew Delhi
260			_bTata McGraw Hill Publishing Company
260			_c2000
650			_aOperating Systems
942			_cBK
999			_c18667 _d18667