Abstract: An electronic maintenance support work station employs a text screen and graphics screen on which text records and part graphics are displayed. The user can sequence through various levels of hierarchy of the product structure as a search is made for a needed part. An item activated on the text screen is automatically targeted on the graphics screen. Part detail information is presented to facilitate decision making when an order point in the search is reached. Direct part or stock number entries can also be entered if the user desires to bypass a search.

Abstract: A multiple display system having a single light pen made to operate with a plurality of synchronized monitors in an array. A determination of which monitor in the array the light pen is being used with, is made to allow simultaneous usage of the light pen on any of the monitors in the array. Other positioning or pointing input devices can be arranged to work with the array of monitors.