000			00318nam a2200145Ia 4500
008			220421s9999||||xx |||||||||||||| ||und||
020			_c295/-
040			_aET
100			_aWALIA EKTA
245		0	_aOPERATING SYSTEM CONCEPTS
260			_bKHANNA PUB. _aNEW DELHI
300			_a340
500			_a29792
942			_cBK
999			_c35807 _d35807