Good old cassettes
Aaah, those were the days where you do almost anything with a cassette. Record any kind of audio through either a hi-fi or portable cassette recorder, even computer games came on cassettes.
I recently discovered a site that features old cassettes, but one cassette they don’t have on there is the one pictured above, a Fuji metal cassette. The reason for having chrome and metal cassettes was that the quality was supposedly better, but unless you had a pretty high-end system, you wouldn’t really tell much difference.
If you want to have a look through some old cassettes and bask in the nostalgic wonder, take a look at tapedeck.org.