What's Your Favorite Obsolete Technological Term That People Still Use?

We live in a time of super-rapid technological change. CDs replaced vinyl, only to be replaced in turn by digital downloads. But language doesn't change as fast — we talk about camera shutters, touching that dial, and "tuning in." What's your favorite obsolete term that's still used all the time?

Please mention the term, what it used to mean back when that technology exists — and how people use it now. Thanks!

Top image: Tune in Tokyo poster, via Tomo Neko. When was the last time anybody actually had to "tune in" a station by adjusting a dial or knob?