<http://schema.org/description>
"When you buy a new Mac it always seems so fast, at first. Know the feeling? Then, after a week or two suddenly you find yourself waiting for another bouncing icon or a spinning ball. ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apple/2010/10/08/what-is-slowing-down-your-mac/>