Of course, if you’re driving a classic antique auto with a tape technology even older than the compact cassette, there are still a few Bluetooth-enabled options for you as well.

the "Compact Cassette" offered an alternative to the much larger vinyl record player as well as the 8-track cartridge. Not only was the drive battery-operated and portable, the tape was recordable ...

My first stop was to find an engineering drawing of the Compact Cassette format, designed by Phillips back in 1963. I could always measure the tapes in front of me, but for something like this ...