| 700 / | HD | DATA PROCESSING: GENERIC CONTROL SYSTEMS OR SPECIFIC APPLICATIONS |
| 90 | DD | SPECIFIC APPLICATION, APPARATUS OR PROCESS {16} |
| 213 | DD | .~ Article handling {5} |
| 219 | DD | .~.~ Associating or disassociating plural articles {3} |
| 221 | | .~.~.~ Having an identification code {1} |
| 222 | DD | .~.~.~.~.~> Monitoring or inspection (e.g., incomplete assembly) |