Today is the 25th birthday of the Compact Disk.
At least, today is the 25th anniversary of the first CD pressed at a pressing plant, according to The Register: it was actually invented in 1979, with the specification finalised in June 1980.
1979 was the year I was born, and the CD has turned into a technology that has dominated my lifetime, spawning the DVD and revolutionising not only music, but computing, which feeds and clothes me.
I don’t know how much longer the CD will survive. MP3s, iTunes and the rest of its children are gradually taking over, and where one 74minutes or 600MB was a huge amount of storage compared to the hard drive in your computer, it’s now trivially small. But the optical disk will be with us for a while, and the CD legacy will go on for many more years.