| 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} |
| 340 | DF | .~.~ Window {4} |
| 343 | | .~.~.~ Window differentiation {1} |
| 344 | DF | .~.~.~.~> Priority {1} |