000			00381nam 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 _c2010
300			_aXXI, 671p. _b475
650			_aOperating systems
999			_c183721 _d183721