The Sega Master System is a third-generation home video game console that was manufactured by Sega. It was originally released in 1985 as the Sega Mark III in Japan. After being redesigned prior to its North American launch, the console was renamed Master System and released in 1986 in North America.
Sales of the console have been estimated between 10 and 13 million compared to 62 million NES units sold. As of 2015, the Master System is the longest-lived game console (30 years and continuing), due to its popularity in Brazil.