How many idioms that were quite common in the not-so-distant past have become obsolete or at least refer to obsolete technology? Quite a few. PC World magazine has compiled a short list of some that may still be used, but many of those using them have no idea to what they refer.
A couple of my favorites:
2. "Kodak moment"
There are plenty more in the article and commenters suggested a few of their own.
You know it when you see it. Nope, I'm not talking about porn: I'm talking that picture-perfect moment you wish you could capture on film, the Kodak moment. But with Kodak filing for bankruptcy and shuttering services, it seems like we're going to need a new name for those photo-ready moments. Hey, I hear the name Polaroid is available...or maybe not.
11. "Drop a dime"
The phrase "drop a dime" has a couple of different meanings. It can be used as a way of saying "get in touch," but it also can be used to describe betraying someone, or turning them in to the cops. However you use the phrase, though, know this: It originated from a time when you had to drop a dime into a pay phone in order to make a phone call. If you don't know what a pay phone is, well, I can't talk to you.
One of my favorites goes back to World War II, that being “The whole nine yards”, referring the 27 feet (or nine yards) of belt-fed ammo used by Allied fighter aircraft machine guns. A pilot saying “I gave him the whole nine yards” meant he emptied his machine guns at his target until he was out of ammo.
Enough of that as I don't want to end up sounding like a broken record (#1 on the list). After all, the list is nothing to write home about (#10) and is definitely not front page news (#5).