00345    a2200133   4500020001500000082001500015100001700030245002100047250001200068260004200080300002000122650004800142650002100190  a1858051649  a004.1bFRE  aFrench, C. S  aComputer science  a5th ed.  aLondonbLetts Educationalc1980g1996  avii,506p.c28cm  aGeneral works on specific types of computer  aComputer science