The Williams Pinball Controller (WPC) is an arcade system board used for several pinball games designed by Williams and Midway (under the Bally name) between 1990 and early-1999. It is the successor to their earlier System 11 hardware (High Speed, Pin*Bot, Black Knight 2000).
There are seven variations of the WPC hardware. The original version is sometimes referred to as WPC-89. The variations are as follows:
- WPC (Alphanumeric) (from Funhouse to The Machine: Bride of Pin*Bot)
- WPC (Dot Matrix) (from Gilligan's Island to Party Zone, plus some of Williams / Midway's redemption games [SlugFest!, Hot Shot Basketball, Addams Family Values])
- Terminator 2: Judgment Day was designed to have a dot matrix display from the start, but it was released after Gilligan's Island, due to T2 having a longer development time than Gilligan's Island.
- WPC (Fliptronics I) (The Addams Family; this game is also compatible with Fliptronics II)
- WPC (Fliptronics II) (from The Getaway: High Speed II to Twilight Zone)
- WPC (DCS) (from Indiana Jones: The Pinball Adventure to Demolition Man)
- Twilight Zone was designed to be the first pinball machine to use the new DCS system, but due to delays of the new hardware design it was decided to release it on the old hardware (using downsampled sound effects) instead
- WPC-S (Security) (from World Cup Soccer to WHO dunnit)
- WPC-95 (from Congo to Cactus Canyon)