| 700 / | HD | DATA PROCESSING: GENERIC CONTROL SYSTEMS OR SPECIFIC APPLICATIONS |
| 1 | DD | GENERIC CONTROL SYSTEM, APPARATUS OR PROCESS {15} |
| 28 | DD | .~ Optimization or adaptive control {13} |
| 54 | | .~.~ Having particular compensation or stabilization feature {1} |
| 55 | DD | .~.~.~> Filtering |