| 700 / | HD | DATA PROCESSING: GENERIC CONTROL SYSTEMS OR SPECIFIC APPLICATIONS |
| 1 | DD | GENERIC CONTROL SYSTEM, APPARATUS OR PROCESS {15} |
| 11 | DD | .~ Sequential or selective {7} |
| 17 | DD | .~.~ Operator interface (e.g., display with control) {1} |
| 18 | | .~.~.~ Specific programming (e.g., relay or ladder logic) |