Microsoft was recently awarded U.S. Patent  7,415,666 for a Method and System for navigating paginated content in page-based increments which has some up in arms at the notion that Microsoft could patent ‘Page-Up’ and ‘Page-Down’  keystrokes. (link)  However, as you consider the outrage, remember that patents are much more than what is set forth in their titles and abstracts, and a true understanding of what is covered can only result from ‘paging down’ through the text of the patent to the claims.  They are the starting point for revealing the true scope of a patent, which in most cases is much more nuanced than what may originally be thought.