Sony introduces the Walkman, the first portable audio cassette player. Over the next thirty years they will sell over 385 million Walkmans in cassette, CD, mini-disc and digital file versions, but later struggled against Apple’s iPod and other new devices.
I just remembered a long unanswered question. Why did Slayer’s Reign in Blood cassette require me to flip it over? The entire album was only 35 minutes.