| 340 / | HD | COMMUNICATIONS: ELECTRICAL |
|
| 500 | DF | CONDITION RESPONSIVE INDICATING SYSTEM {6} |
| 540 | DF | .~ Specific condition {18} |
| 573.1 |  | .~.~ Human or animal {9} |
| 574 | DF | .~.~.~> Holdup |
| 575 | DF | .~.~.~> Sleep |
| 576 | DF | .~.~.~> Drive capability |
| 573.2 | DF | .~.~.~> Nondomestic animal (e.g., for hunting, fishing, or repelling) |
| 573.3 | DF | .~.~.~> Domestic animal training, monitoring, or controlling |
| 573.4 | DF | .~.~.~> House arrest system, wandering, or wrong place |
| 573.5 | DF | .~.~.~> Incontinence or enuresis alarm |
| 573.6 | DF | .~.~.~> Water safety alarm |
| 573.7 | DF | .~.~.~> Posture alarm |