| 700 / | HD | DATA PROCESSING: GENERIC CONTROL SYSTEMS OR SPECIFIC APPLICATIONS |
| 90 | DD | SPECIFIC APPLICATION, APPARATUS OR PROCESS {16} |
| 95 | DD | .~ Product assembly or manufacturing {7} |
| 97 | DD | .~.~ Design or planning {5} |
| 103 | | .~.~.~ Constraints or rules {1} |
| 104 | DD | .~.~.~.~> Knowledge base (e.g., expert system) |