| http://www.w3.org/ns/prov#value | - Alternatively, control unit 40 includes off-screen input devices 44, which can be membrane switches, knobs, push-buttons or other types of electromechanical input devices.As seen in FIG. 2, video monitor 42 and input devices 44 are connected and controlled by one or more printed circuit board 46, which includes among other components random access memory (???RAM???), read only memory (???ROM???) 4
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