Alternate-historical obsolete signifiers

So in OTL, there are quite a few symbols we use that made perfect sense back when we started using them, and now don't really make sense but survive on tradition. Like the "save" symbol on a computer being a floppy disk, or a old-style handset phone being the symbol for a phone call, or the envelope on the "send" button on an email. Let's brainstorm some ATL obsolete signifiers. Pre-1900 is fine but I figure most of then will be post-1900.

For example, I could see an ATL where pneumatic tube systems are more common standardize on a message capsule as the symbol for emails. Or maybe the crosswalk signal is a traffic-directing policeman. Or the standard map symbol for an airfield is a flat area with a mooring mast and a zeppelin, as they were the primary air-travel method for a while. That last one would be fun to spring on interdimensional travelers - they see a map and think zeppelins will be everywhere, but really they're as gone as IOTL ;). Thoughts?
 
In our timeline, the "Bluetooth" short-range wireless technology, named in honor of Danish king Harald Bluetooth, combines the first runes of his name and nickname to create the Bluetooth icon. In a world in which Styrbjörn Sterki managed to kill Harald, the icon for the "Strongbear" short-range wireless technology might have been created in the same way.


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A world where Alan Turing doesn't commit suicide could be different in terms of Apple.

Perhaps they would be called Colossus? Or if they want to honour him, Turing was well known for his bicycle, so maybe we would be using Cycle computers.
 
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