000			00328nam a2200133 4500
999			_c8263 _d8263
020			_a817359001
082			_a001.642SRI
100			_aSirvasta, Harish Chandra
245			_aLet's Learn DOS
260			_aNew Delhi _bSterling Information Technologies, _c1994.
300			_a46p. ;
650			_aDOS Operating system
942			_cBK