Blu-ray discs have more storage than DVDs, so they can hold higher-quality movies Blu-ray is one of two high-definition disc formats introduced to consumers in 2006. Along with its rival, HD-DVD ...

A direct access storage device that is written and read by light. The most common types are CD, DVD and Blu-ray. As removable media, optical discs superseded the earlier magnetic disk cartridges ...

Today's optical data-storage technologies, such as CD, DVD and Blu-ray, use one-photon-absorption processes for writing and reading information. In particular, a bit of information is recorded ...