The 1972-era desktop sized iPod Who says that before the iPod we could play one song/album at a time? Cassette players held one tape, and at up to 120 minutes per tape that meant about 2 albums worth of music, after which you'd have to manually switch the tape. Oh the inhumanity of it all, having to walk across the room to switch tapes. With a record player, you could stack multiple records and it would play one after another. For the most part we were stuck playing one, or maybe two, albums at a time. And we walked uphill, both ways, through the snow, every day to school. Actually, ingenious engineers created wondrous mechanical gizmos for many purposes, including this cassette-tape carousel. It held up to 20 cassette tapes, could play one at a time, or could play a programmed sequence, for up to 2 1/2 days of continuous music. AND, it was built in 1972. I bet Steve Jobs was having fond memories of this cassette carousel when he inspired Apple to create the iPod.