00334nam a2200133Ia 4500008004100000020001500041041001200056082001600068100001400084245004500098260003300143300000800176650001600184221030s9999    xx            000 0 und d  a041215630X  aEnglish  a105.23bBar  aD. Barron 0aComputer Operating Systemscby D. Barron  bChapman & HallaLondonc1984  a140  aBE Computer