00312nam a2200121Ia 4500008004100000020001500041041001200056100001800068245004200086260004000128300000800168650001400176221030s9999    xx            000 0 und d  a0074604821  aEnglish  aJ. J. Donovan 0aSystems Programmingcby J. J. Donovan  bMcGraw - Hill Pub.aNew Delhic2015  a488  aComputers