The , referred as GBC, is a handheld game console manufactured by Nintendo. It was released on October 21, 1998 in Japan and was released in November of the same year in international markets. It is the successor of the Game Boy. The Game Boy Color, as suggested by the name, features a color screen. It is slightly thicker and taller than the Game Boy Light, which is a redesigned Game Boy released in 1998. As with the original Game Boy, it has an 8-bit processor and the custom Zilog Z80 central processing unit (CPU). The original name – with its American English spelling of “color” – remained unchanged even in markets where “colour” was the accepted English spelling, such as the UK, Ireland, Canada, Australia, South Africa, and New Zealand. While mostly retaining the same hardware as the fourth generation Game Boy, the Game Boy Color was released during the fifth generation of gaming, and its primary competitors were the SNK's Neo Geo Pocket and the Bandai's WonderSwan (JDM only), though the Game Boy Color outsold these by a huge margin. The Game Boy and Game Boy Color combined have sold 118.69 million units worldwide. It was not discontinued until the release of the Game Boy Advance SP, a redesigned Game Boy Advance in 2003.