We lived though this and know the history, but it's interesting to see how the technology behind the music has affected the music we listen to. This thread connects the dots between how we got from the Vinyl LP to Spotify today.
Columbia Records developed the Vinyl LP in 1948 and RCA Victor developed the Vinyl 7 inch single in 1949. Both formats are still used to this day.
In 1954 George Eash developed the Fidelipac which was a closed loop recording used by radio stations for commercials and jingles.
in 1962 a sales man in Los Angeles named Madman Muntz starting installing Fidelipac players in cars branded as Muntz Autostereo. Stars like Sinatra and James Garber were customers.
In 1963 Phillips released the compact cassette which was originally developed for voice recordings and taking dictation at companies. It was not intended for music.
Also in 1963, Bill Lear launched the Lear jet with a Muntz Autostereo in it. Customers started complaining that the tapes were jamming, so Bill had his engineers redesign both the tapes and the players and named it the Lear Jet 8 track player.
Bill got a consortium together including Ford, GM. Motorola, RCA, and Ampex to launch factory installed 8 track players in cars. In 1966 the 8 track was an option on the Ford Mustang, Thunderbird, and Lincoln's.
Coincidentally, in 1966 Phillips opened the design to the compact cassette to all companies license free.