Blu-ray disc

From Styleguide

Blu-ray disc

The high-capacity disc format used by Sony’s PlayStation 3. Also used to refer to the discs themselves.

Blu-ray acceptable after first reference. Note that not all PlayStation 3 games are on Blu-ray discs.

Example: The PlayStation 3 supports games and movies written on high capacity Blu-ray discs. The Blu-ray format can hold five times more data than normal DVDs.

Wrong: blu-ray, blu-Ray, Blu-Ray, bluray disc, Blu-Ray Disc, blue-ray, bluray.

Also see: HD DVD.