| 361 / | HD | ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES | 
| 600 | DF | HOUSING OR MOUNTING ASSEMBLIES WITH DIVERSE ELECTRICAL COMPONENTS {11} | 
| 679 | DF | .~ For electronic systems and devices {15} | 
| 748 | DF | .~.~ Printed circuit board {4} | 
| 784 | DF | .~.~.~ Plural {5} | 
| 796 | DF | .~.~.~.~ With housing or chassis {6} | 
| 802 |  | .~.~.~.~.~ Specific alignment or guide means |