000			00428nam a2200169Ia 4500
008			230711s9999||||xx |||||||||||||| ||und||
020			_a978-93-272-3934-7
041			_aENG
082			_a5.42 _bSI-A
100			_aGurdas Singh
245		0	_aAdvance operating system
250			_a1st . Ed.
260			_c2014 _aNew Delhi _bKalyani Publishers House
650			_aComputer Engineering
700			_aMohanjit Singh
942			_cBK
999			_c6021 _d6021