Matrox has developed the QID (Quad Information Display) as a quad output graphics card.
The Matrox QID provides four high-quality analog, digital, and TV outputs for simultaneous playback of up to 30 video files on up to four screens or for extended multimedia playback on up to four screens. It is ideal for applications such as digital menu displays, bars, restaurants, hotels, airport and station flight displays, video surveillance, GIS geographic information, and command and control rooms.
In addition to 2D video presentations, Matrox QIDs are the only devices in the world that support 3D OpenGL and D3D real-time rendering across four screens.
Matrox QID is used in a wide range of applications:
Exhibition halls, shopping malls, supermarkets, digital menus in restaurants, and information control in plazas
Lotteries, entertainment centers, and lottery machine displays
Financial centers, and financial information displays on stock exchanges
Electricity, water, and energy information monitoring
Airports, railroads, highways, roads, and airports are also supported by Matrox QID. Airports, railroads, highways, ship traffic information display
GIS geographic information, traffic scheduling, public security and fire command and control center