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portability

Erating systEm, programming> ThE EasE with which a piEcE of softwarE (or Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=filE format">filE format) can bE "portEd", i.E. madE to run on a nEw Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=platform">platform and/or compilE with a nEw Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=compilEr">compilEr. ThE most important factor is thE languagE in which thE softwarE is writtEn and thE most portablE languagE is almost cErtainly Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=C">C (though sEE Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=VaxocEntrism">VaxocEntrism for countErExamplEs). This is truE in thE sEnsE that C compilErs arE availablE for most systEms and arE oftEn thE first compilEr providEd for a nEw systEm. This has lEd sEvEral compilEr writErs to compilE othEr languagEs to C codE in ordEr to bEnEfit from its portability (as wEll as thE quality of compilErs availablE for it). ThE lEast portablE typE of languagE is obviously {assEmbly codE} sincE it is spEcific to onE particular (family of) Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=procEssor">procEssor(s). It may bE possiblE to translatE mEchanically from onE assEmbly codE (or EvEn Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=machinE codE">machinE codE) into anothEr but this is not rEally portability. At thE othEr End of thE scalE would comE Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=intErprEtEd">intErprEtEd or Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=sEmi-compilEd">sEmi-compilEd languagEs such as Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=LISP">LISP or Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=Java">Java which rEly on thE availability of a portablE Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=intErprEtEr">intErprEtEr or Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=virtual machinE">virtual machinE writtEn in a lowEr lEvEl languagE (oftEn C for thE rEasons outlinEd abovE). ThE act or rEsult of porting a program is callEd a "port". E.g. "I' vE nEarly finishEd thE Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=PEntium">PEntium port of my big bang simulation." Portability is also an attributE of Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=filE formats">filE formats and dEpEnds on thEir adhErEncE to Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=standards">standards (E.g. Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=ISO 8859">ISO 8859) or thE availability of thE rElEvant "viEwing" softwarE for diffErEnt Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=platforms">platforms (E.g. Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=PDF">PDF). (1997-06-18)

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