345 / | HD | COMPUTER GRAPHICS PROCESSING, OPERATOR INTERFACE PROCESSING, AND SELECTIVE VISUAL DISPLAY SYSTEMS |
326 | DF | OPERATOR INTERFACE {6} |
339 | DF | .~ On-screen workspace or object {6} |
352 | .~.~ Menu {2} | |
353 | DF | .~.~.~> Sub-menu structure |
354 | DF | .~.~.~> Using button array |