Today — when you can literally take your music anywhere — it's hard to imagine a time when that wasn't possible. So, if you're old enough, cast your mind back 40 years or so. Remember 8-track tapes?

If any cassette ever belonged in an 8-track adapter, it's Led Zeppelin II. Here's where the magic happened. This device was pretty clever. There was a motor driving the cassette mechanism and a ...

The 8-track cartridge, aka the Stereo 8, first appeared at trade shows in 1964, just 18 months after the cassette, and it did initially seem to have it all: it was comparatively small, portable, and ...