Desktop computers have a unit, located within the system unit, that plugs into a standard wall outlet, converts ac to dc, and provides the power to drive all the system unit components.

Board game basics: the main types of board games. as a general rule, board games can be divided into three categories: war games, game design is the art of applying design and aesthetics to create a game for game design creates goals, rules and challenges to define a board game, list of types of games