| 710 / | HD | ELECTRICAL COMPUTERS AND DIGITAL DATA PROCESSING SYSTEMS: INPUT/OUTPUT |
| 1 | DF | INPUT/OUTPUT DATA PROCESSING {16} |
| 62 | DF | .~ Peripheral adapting {4} |
| 72 | ![]() | .~.~ Application-specific peripheral adapting {2} |
| 73 | DF | .~.~.~> For user input device |
| 74 | DF | .~.~.~> For data storage device |