A video game console is an interactive entertainment computer or customized computer system that produces a video display signal which can be used with a display device (a television, monitor, etc.) to display a video game. The term “video game console” is used to distinguish a machine designed for consumers to buy and use solely for playing video games from a personal computer, which has many other functions, or arcade machines, which are designed for businesses that buy them and then charge others to play. As of 2007, it is estimated that video game consoles represent 25% of the world’s general-purpose computational power.