| 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} |
| 223 | DD | .~.~.~ Collating or sorting {1} |
| 224 | | .~.~.~.~ Having an identification code |