| 345 / | HD | COMPUTER GRAPHICS PROCESSING, OPERATOR INTERFACE PROCESSING, AND SELECTIVE VISUAL DISPLAY SYSTEMS | 
| 326 | DF | OPERATOR INTERFACE {6} | 
| 329 | DF | .~ For plural users or sites {2} | 
| 331 |  | .~.~ Computer supported cooperative work {1} | 
| 332 | DF | .~.~.~> Group window |