00375nam a2200145 a 450000500170000002000180001708200130003510000190004824500240006725000120009126000320010330000270013549000280016263000390019020251202164128.0  a0 333 387 147  a004bWRI  aWright, G.G.L.  aMastering computers  a2nd ed.  aLondonbMacmillan, GBc1984  axii, 227p.b21 cm.cPB  aMacmillan Master series  aComputer and its operation, Manual