Located in
San Mateo,
California, this company ("Gravis" =
Latin for "heavy") produces
gamepads,
joysticks and other
PC game controllers. It was founded in 1985 by "two serious gamers" (quote www.gravis.com).
These days, Gravis still produces popular game controllers like the Xterminator, Eliminator and Destroyer series. They have discontinued their series of soundcards (such as the Gravis Ultrasound, an extremely popular soundcard in it's time), though, and now only concentrate on controllers.