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200 1 $aOperating systems$ea systematic view$fWilliam S. Davis
210   $aReading Massachusetts$cAddison Wesley Publishing Company$d1978
215   $aXViii, 395 p.$cill., graf., tab.$d23 cm
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610 0 $aSistemi operativi
610 0 $aElaboratori elettronici$xProgrammazione
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700  1$aDAVIS,$bWilliam S.$0168019
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