Kindle DX,

User-created annotations

Users can bookmark, highlight and look up content. Pages can be dog-eared for reference and notes can be added to relevant content. While a book is open on the display, menu options allow users to search for synonyms and definitions from the built-in dictionary. The device also remembers the last page read for each book. Pages can be saved as a "clipping", or a text file containing the text of the currently displayed page. All clippings are appended to a single file, which can be downloaded over a USB cable.

Kindle Development Kit (KDK)

On January 21, 2010, Amazon announced the forthcoming release of their Kindle Development Kit.Their aim is to allow developers to build 'active content' for the Kindle, and a beta version was announced with a February 2010 release date. A number of companies have already experimented with delivering active content through the Kindle's bundled browser, and the KDK promises 'sample code, documentation and the Kindle Simulator' together with a new revenue sharing model for developers.
The KDK is based on the Java Programming Language, specifically, the JSR 1.1.2 Personal Basis flavor of packaged Java APIs.

Textbook Rentals

On July 18, 2011, Amazon began a program that allows college students to rent Kindle textbooks from three different publishers for a fixed period of time.

Business model

Kindle Direct Publishing

Concurrently with the Kindle device, Amazon launched the Kindle Direct Publishing, where authors and publishers independently publish their books directly to Kindle and Kindle Apps worldwide. In open beta testing as of late 2007, the platform has been promoted to established authors by an e-mail^[81] and by advertisements at Amazon.com. Authors can upload documents in several formats for delivery via Whispernet and charge between $0.99 and $200.00 per download.^[81]
In a December 5, 2009 interview with The New York Times, CEO Jeff Bezos revealed that Amazon.com keeps 65% of the revenue from all ebook sales for the Kindle.^[82] The remaining 35% is split between the book author and publisher. After numerous commentators observed that Apple's popular App Store offers 70% of royalties to the publisher, Amazon began a program that offers 70% royalties to Kindle publishers who agree to certain conditions.
Other criticisms involve the business model behind Amazon's implementation and distribution of e-books. Amazon introduced a software application allowing Kindle books to be read on an iPhone or iPod Touch. Amazon soon followed with an application called "Kindle for PCs" that can be run on a Windows PC. Due to the book publisher's DRM policies, Amazon claims that there is no right of first sale with e-books. Amazon states they are licensed, not purchased; so unlike paper books, buyers do not actually own their e-books according to Amazon. This has however never been tested in the courts and the outcome of any action by Amazon is by no means certain. The law is in a state of flux in jurisdictions around the world.

Remote content removal

On July 17, 2009, Amazon.com withdrew certain Kindle titles, Animal Farm and Nineteen Eighty-Four by George Orwell, from sale, refunded the cost to those who had purchased them, and remotely deleted these titles from purchasers' devices after discovering that the publisher lacked rights to publish the titles in question. Notes and annotations for the books made by users on their devices were left in a separate file, but "rendered useless" without the content they were directly linked to.The move prompted outcry and comparisons to Nineteen Eighty-Four itself. In the novel, books, magazines and newspapers in public archives that contradict the ruling party are either edited long after being published or destroyed outright; the removed materials go "down the memory hole", nickname for an incinerator chute. Customers and commentators noted the resemblance to the censorship in the novel, and described Amazon's action in Orwellian terms. Some critics also argued that the deletion violated the Kindle's Terms of Service, which states in part:^[93]

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