Shifting time and space.

The article reports on the legal and legislative battles over the right to space-shift music from a cassette disc in the U.S. A few years ago, the Supreme Court has settled the question of whether time-shifting of copyrighted works is a fair use under U.S. law. As a result, makers of devices that facilitate such non-infringing copying cannot be held liable. In fact, the settled principle led directly to the introduction of the digital video recorder, the iPod, and the personal computer.