| 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 | | .~.~.~ Plural {5} |
| 785 | DF | .~.~.~.~> With separable connector or socket means {6} |
| 792 | DF | .~.~.~.~> Plural contiguous boards {3} |
| 796 | DF | .~.~.~.~> With housing or chassis {6} |
| 803 | DF | .~.~.~.~> Interconnection details |
| 804 | DF | .~.~.~.~> Spacer details |