000			00443nam a2200181Ia 4500
008			201023s9999||||xx |||||||||||||| ||und||
020			_a978-81-89928-35-3
100			_aCharanjeet singh.
245		0	_aOperating System
250			_a3rd
260			_aNew Delhi _bKalyani _c2015
300			_a520
365			_b358/-
650			_aComputer Science.
942			_cTB
999			_c284 _d284