How to Tell if a Disc Is a CD or a DVD: 7 Steps (with Pictures)
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File:Diferencias Tecnicas entre CD,DVD y Blu-RAY.jpg - Wikimedia Commons
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Ben Krasnow on X: Here's a comparison of CD, DVD, and Blu-ray discs in a scanning electron microscope. Same scale for each. @scanlime / X
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Glossary of terms for CD, DVD, Blu-ray and HD-DVD
CD, DVD and Blu-ray Disc - Physics - Metropolia Confluence
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A Guide to CD, DVD, Blu-ray and Game disc Recovery Software
