A new disc format made by Sony Corporation. It is primarily used to store High Definition video but it can also be used to store data like a DVD. Blu-ray uses a blue laser operating at a wavelength of 405 nm to read and write data. The small wavelength allows to store up to 200GB on a disc in 8 layer mode. A typical single layer blu-ray disc can hold 25GB. A popular video game console that uses blu-ray is Sony PlayStation 3.
Bob: "Do you have blu-ray?"
Tom: "NO. what's that?"
Bob "It's this new disc format made by SONY that can hold 25GB"