Special Features:

Used to read specific device; 25gb; blue laser technology; wavelength of 45nm; smaller data pits increases ampount of data on disc; high capacity for (hdtv) high definition television

Properties:

A flat circular item, rigid or flexible upon which optic variations or optic and sonic variations are recorded by electronic, magnetic, mechanical, or laser-beam techniques. It may or may not include grooves and may or may not be enclosed in a protective covering such as a cassette. Excludes disk, sound recording.