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I came across DCC (Digital Compact Cassettes) this month: https://en.wikipedia.org/wiki/Digital_Compact_Cassette. A digital cassette tape format with the players being backwards compatible with standard audio cassettes. Not massively surprising that I didn't remember them from the 90s, as they were about for roughly 4 years and lost to MiniDisc, which itself wasn't particularly successful. So many of the inventions of that era are a fascinating combination of mechanics and electronics.

Built by tiny Asian hands- remember in the 1980s there were a lot of young people and various countries desperate for economic growth.

Tomtom's origin story is freaking amazing. Now, satnav is a free add on, supported by advertising.