The Cloud That Rains Music
For years now, the most popular music system — Apple’s — has worked like this. You buy song files from the iTunes store. They download to your computer. If you want to listen to them on the road, you connect your iPod or iPhone to that computer and copy the files to it.
Amazon, whose online music store competes with Apple’s, has two problems with that arrangement. First, your music library is messily scattered.