https://www.washingtonpost.com/world/2021/03/13/tributes-roll-inventor-cassette-tape-his-global-impact/
A nice article paying tribute to the Dutch Philips engineer, that invented the audio cassette tape. I remember those days when the cassette tape cartridges were taking over from records, due to the portability a battery powered audio cassette pocket players, aka, the Sony walkman. Just today, I see numerous brand new pocket cassette players in the Thrift store for about $3.