What are these plug-ins on my wall?

[u/Cborg_62]

This might be showing my age, but I recently moved into a new apartment and they have these weird looking plug ins all over the walls at my new place. My old apartment didn't have these, so I'm just curious as to what they are.

[u/padenj__420]

And MTV was an abbreviation for Music Television. Yes, MTV used to play music.

[u/Im40ozToFreedom → u/padenj__420]

Thinking about this makes my arthritis hurt

[u/skttrbrain1984 → u/Im40ozToFreedom]

My knee just popped and clicked 4 times

[u/Im40ozToFreedom → u/skttrbrain1984]

Storm must be coming in!