00286nam a2200133Ia 4500008004100000100000900041245003200050250001200082260001500094300000800109650001300117942000700130999001500137190216s9999||||xx |||||||||||||| ||und||  aNull 0aIntroducing Data Processing  a1st Ed.  bNullc1984  a237  aComputer  cBK  c8350d8350