000			00311nam a2200133Ia 4500
020			_a0672270110
082			_a004 _bWAL
100			_aWalker, Roger S.
245			_aUnderstanding computer science
250			_a2nd
260			_aUSA _bHaward W. Sams & Co. _c1984
300			_aiii,274p
650			_aComputer Science
999			_c2228 _d2228