Apparently I once purchased a CD (circular optical “compact” disk with digital music files) from Amazon.
You may have noticed that songs from “Is This It” by The Strokes, a CD you purchased in 2002, were added to your Cloud Player library. This means that high-quality MP3 versions of these songs are available for you to play or download from Cloud Player for FREE. You can find your songs in the “Purchased” playlist.
I hadn’t noticed.