What is "green book"

Green Book may refer to:

The "Green Book", formally known as the "CD-i Full Functional Specification", is a CD standard developed in 1986 by Philips and Sony that defines the format for interactive, multimedia compact discs designed for CD-i players. The standard was originally not freely available and had to be licensed from Philips. However, the 1994 version of the standard was eventually made available for free by Philips.

CD-i discs conform to the Red Book specification of audio CDs (CD-DA). Tracks on a CD-i's program area can be CD-DA tracks or CD-i tracks, but the first track must always be a CD-i track, and all CD-i tracks must be grouped together at the beginning of the area. CD-i tracks are structured according to the CD-ROM XA specification (using either Mode 2 Form 1 or Mode 2 Form 2 modes), and have different classes depending on their contents ("data", "video", "audio", "empty" and "message"). "Message" sectors contain audio data to warn users of CD players that the track they are trying to listen to is a CD-i track and not a CD-DA track. The CD-i specification also specifies a file system similar to (but not compatible with) ISO 9660 to be used on CD-i tracks, as well as certain specific files that are required to be present in a CD-i compatible disc.

The CD-i Ready format is a type of bridge format, also designed by Philips, that defines discs compatible with CD Digital audio players and CD-i players. This format puts CD-i software and data into the pregap of Track 1.

The CD-i Bridge format, defined in Philips' White Book, is a transitional format allowing bridge discs to be played both on CD-ROM drives and on CD-i players.

The Green Book is a document issued since 1971 by the Central Tibetan Administration (commonly known as the Tibetan Government in Exile) to Tibetans living outside Tibet, and described by the issuing organization as "the most official document issued by the Tibetan Government in Exile." More than 90 per cent of Tibetan exiles own one. It serves as a receipt book for the person's "voluntary taxes" to the CTA, and has been described by a CTA official as "the passport of the exiled Tibetans to claim their rights from the Tibetan Government in Exile". The CTA says that in the future, the document "will become a base to claim Tibetan citizenship".

The document is valid for 5 years.