000			00308nam a2200109Ia 4500
008			220120s9999||||xx |||||||||||||| ||und||
100			_aDas, Annapurna and Das, Sisir K _911763
245		0	_aMicrowave engineering
260			_aTata mcgraw hill company Ltd _c2005
300			_b180
650			_aOperating systems
999			_c137140 _d137140