Amazon Kindle DX

Ever since it's debut in November of 2007, Amazon.com's Kindle electronic book reader has remained one of its flagship products, targeting the e-book market at entirely new demographics. The Kindle also continues to evolve, seeing its second generation in early 2009 and, in June of that same year, appearing again as the Kindle DX. So what new features does the Kindle DX bring to your virtual libraries, and does it lose anything when compared to its predecessors? Below you'll find an overview of what new features the DX offers.

The Kindle DX features a number of advantages over the Kindle 2. Sporting four gigs of internal flash memory, the DX doubles the capacity of its predecessor, allowing for the storage of approximately 3000 non-illustrated titles. The screen is also larger, measuring in at ten inches as compared to the six inches of the previous Kindle's. This larger screen makes textbooks easier to view, thus targeting a new demographic of college students not wishing to be burdened by numerous heavy physical volumes.

Amazon also expanded the selection of accessible formats by including PDF support, thus freeing Kindle DX users from brand lock-in. By supporting PDF titles, the Kindle DX is taken out of Amazon's closed ecosystem, becoming a reader capable of rendering any number of business documents, periodicals and e-books, including large libraries of public domain classics.

One of the DX's new innovative features is its inclinometer, enabling it to be flipped sideways or upside-down while still retaining the correct text orientation. For years, critics of e-books have argued that separate reading devices are less convenient than physical books. While it may seem minor, the addition of the inclinometer showcases a level of customizability for the reading experience simply not available with non-electronic books. The inclinometer also improves the PDF viewing experience. By changing orientation, it is sometimes possible to zoom in on otherwise difficult-to-view PDFs that were designed to be viewed on computer screens.