The Commodore 64 is an 8-bit home computer introduced in January 1982 by Commodore International. Preceded by the Commodore VIC-20 and Commodore PET, the C64 takes its name from its 64 kilobytes (65,536 bytes) of RAM, and has technologically superior sound and graphical specifications when compared to some earlier systems such as the Apple II and Atari 800, with multi-color sprites and a more advanced sound processor. The C64 dominated the low-end computer market for most of the 1980s. Part of the Commodore 64's success is because it was sold in retail stores instead of just electronics and/or computer stores. Commodore produced many of its parts in-house to control costs, including custom IC chips from MOS Technology. Approximately 10,000 commercial software titles have been made for the Commodore 64 including development tools, office productivity applications, and games.