000			00382nam a2200145Ia 4500
008			220217s9999||||xx |||||||||||||| ||und||
020			_a0-07-053475-6
082			_a005 .43 DAS
100			_aDas, sumithabha
245		0	_aUnix :concepts and applications.
250			_a4th
260			_aTata Mc-Graw hill _bNew Delhi _c2007
300			_b325
650			_aOperating systems
999			_c175089 _d175089