Dvd
Disg optegol a ddefnyddir i gadw data digidol, e.e.
Maent yn debyg i grynoddisg o rhan golwg, ond gan fod data ar DVD wedi ei amgodio ar ddwysedd uwch, maent yn medru dal hyd at 12 gwaith yr wybodaeth y gellir ei chadw ar grynoddisg.
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| Enghraifft o'r canlynol | physical media format, audio release format  |
|---|---|
| Math | optical disc, machine-readable medium |
| Rhagflaenwyd gan | VHS, crynoddisg, LaserDisc |
| Olynwyd gan | Blu-ray Disc |
| Perchennog | Sony |
 Ffeiliau perthnasol ar Gomin Wicimedia | |
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