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2. Blu-ray Disc was developed by the Blu-ray Disc Association, a group of companies representing consumer electronics, computer hardware, and motion picture production. The standard is covered by several patents belonging to different companies. Blu-ray Disc (Blu-ray or BD) is an optical disc storage media format. Its main uses are high-definition video and data storage.

3. A single-layer Blu-ray disc, which is roughly the same size as a DVD, can hold up to 27 GB of data -- that's more than two hours of high-definition video or about 13 hours of standard video. A double-layer Blu-ray disc can store up to 50 GB, enough to hold about 4.5 hours of high-definition video or more than 20 hours of standard video.

5. The Name The Blu-ray name is a combination of "blue," for the color of the laser that is used, and "ray," for optical ray. The "e" in "blue" was purposefully left off. The name Blu-ray Disc is derived from the blue-violet laser used to read and write this type of disc.

6. The Details Data storage, High-definition video and PlayStation3 games Usage Blue-ray Disc Association Developed by 405 nm laser, 1x@36 Mbit/s 2x@72 Mbit/s 4x@144 Mbit/s 6x@216 Mbit/s 12x@432 Mbit/s Read mechanism 25 GB (single layer) 50 GB (dual layer) Capacity MPEG-2, MPEG-4 AVC (H.264), and VC-1 Encoding High-density optical disc Media type

7. Structure of the Disc

8. Read/Write

9. Storage Capacity

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