Fformat ffeil perchnogol â ddatblygir gan Adobe Systems er mwyn cyflwyno dogfennau dau ddimensiwn mewn fformat sy'n annibynnol o ddyfais a chydraniad yw Portable Document Format (PDF).
Eginyn erthygl sydd uchod am gyfrifiaduron neu gyfrifiadureg. Gallwch helpu Wicipedia drwy ychwanegu ato.
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