000			00425nam a2200181Ia 4500
008			201023s9999||||xx |||||||||||||| ||und||
020			_a0
100			_aGurjeet Singh
245		0	_aOperating Systems.
250			_a1
260			_aNew Delhi _bUDH _c2012
300			_a495
365			_b295
650			_aComputer Science.
942			_cTB
999			_c3229 _d3229