| 712 / | HD | ELECTRICAL COMPUTERS AND DIGITAL PROCESSING SYSTEMS: PROCESSING ARCHITECTURES AND INSTURCTION PROCESSING (E.G., PROCESSORS) |
| 1 | DF | PROCESSING ARCHITECTURE {7} |
| 28 | DF | .~ Distributed processing system {2} |
| 30 | | .~.~ Operation {1} |
| 31 | DF | .~.~.~> Master/slave |