00365nam a2200133 a 450000500170000002000150001708200130003210000250004524500500007026000320012030000220015249000280017463000290020220251202164128.0  a0070478341  a004bORI  aOrilia, Lawrence, S.  aTheory and problems of computers and business  aNew YorkbMcGraw-Hillc1984  a292p.c22 cm.bPB  aSchaum's outline series  aBusiness data processing