Currently, there are Seven (7) types of Blu-ray Disc Format Specifications. (As of February 22, 2008)
"Blu-ray Disc" and the Logo are trademarks.
Format name is "Blu-ray Disc", or "BD" as shortened term.
The first format of Blu-ray Disc was defined in July of 2002, from Blu-ray Disc Rewritable Format Version 1.0.
By the kinds of medias (discs), BD Formats are classified three types as 1) Rewritable (RE) Formats , 2) Recordable (R) Formats , and Read-Only (ROM) Format. Every formats are defined the specifications not only for single layer but also for dual layer in the Part 1 Basic Format Specifications.
Please refer to following pdf chart for more information.
