| 700 / | HD | DATA PROCESSING: GENERIC CONTROL SYSTEMS OR SPECIFIC APPLICATIONS |
| 90 | DD | SPECIFIC APPLICATION, APPARATUS OR PROCESS {16} |
| 213 | DD | .~ Article handling {5} |
| 214 | DD | .~.~ Article storing, retrieval, or arrangement (e.g., warehousing, automated library) {4} |
| 218 | | .~.~.~ Particular charging or discharging apparatus |