There are 3 distinct areas when you look at the bottom of a GD-ROM disc. The low-density inner track (dark gray) contains about 35 Mb of data, which is also accessible by normal CD-Readers. On an ordinary CD player, the track would launch a warning that the disc should be used only in the Dreamcast in various languages. Other variations use the game's character's voices in a lighthearted or humorous message. For example, Skies of Arcadia gives the message "We can't save the world from a CD player! Put us back in the Dreamcast so we can do our job!" The CD section also contains a data segment, readable in PCs. Although most discs include only text files identifying the game, its copyright and bibliography, some contain bonus material for home computer users. For example, Sonic Adventure con