The System 11 (commonly known as the Namco System 11) is an arcade system board by Namco that is based on Sony's PlayStation hardware and was used in a variety of first-party and third-party arcade games from 1994 to 2004. It was later superseded by the System 246 board (which were based on the PlayStation 2).
It was designed as a more cost-effective alternative to Namco's proprietary System 22 series of boards. While it is based on PS1 hardware, all ROMs are soldered onto the board and cannot be swapped (unlike some other console-based hardware, such as Sega ST-V).
It received two alternate revisions: Namco System 12 and Namco System 10.