00310nam a2200121 a 450000500170000002000150001708200170003210000250004924500470007425000120012126000320013330000230016520251203090453.0  a0070478422  a001.64,bori  aOrilia, Lawrence, S.  aComputers and information: an introduction  a3rd ed.  aNew York: McGraw-Hillc1986  axxvi,655p.c22 cm.