000			00384nam a2200145Ia 4500
008			220217s9999||||xx |||||||||||||| ||und||
020			_a9780070635463
082			_a005.43 DAS
100			_aDas, Sumitabha _91470
245		0	_aUnix
250			_a4th
260			_aTata mcgraw hill company Ltd. _bNew Delhi _c2012
300			_aXVIII, 671p. _b599
650			_aOperating systems
999			_c185186 _d185186