For Fun: Old people icons that don't make sense anymore

What happens when all the things we based our icons on don't exist anymore? Do they just become, ahem, iconic glyphs whose origins are shrouded in mystery?

Image source: Article
For example, the Floppy Disk Icon means "save" for a whole generation of people who have never seen one.

And why are they called Radio Buttons? Because my car radio used to have buttons where only one could be pressed at any time. I miss my 8-track.

What icons don't make sense to you?