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MP3 and the Mac

Near the end of the 20th century, cassette tape players were all the rage, and music stores also sold music on quaint analog devices called records. Records physically generated sound using a needle that scratched along grooves on the record’s surface. People who needed to take their music with them would either buy tapes or copy their records onto tape.

Fast forward a few years, and tapes and records are history, replaced by compact discs (CDs), which provide digital audio in a portable, virtually indestructible format. CDs still share one thing with their analog predecessors—you have to visit a physical or online store before you can listen to the music a CD contains.


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