Devices that you've never seen in a public building.

Okay, not everyone here is a fire alarm collector (I’m not), so I decided to create a more general thread that noncollectors can participate in. What are some devices that you know about that you have never seen in a public building?

Anybody on this board is welcome to participate in this topic: <URL url="Devices in Your Collection That You've Never Seen in a Public Building text=“viewtopic.php?f=3&t=9220”>Devices in Your Collection That You've Never Seen in a Public Building

There is no need to have duplicate topics.