| 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} |
| 356 | ![]() | .~.~ Hierarchy or network structure {1} |
| 357 | DF | .~.~.~> Navigation within structure |