A Kindle is a portable hardware device first released in the United States by Amazon.com November 19, 2007. Kindle displays images and text using E ink and is capable of getting e-books over the Amazon Whispernet using Sprint's EVDO. Users have access to hundreds of thousands of books from Amazon.com. The cost is typically less than the paper back version and you can subscribe to magazines, get newspaper subscriptions, RSS feeds, and even connect to the Internet with a basic browser.
What makes the Kindle unique when compared to a computer is the technology behind displaying the text. The text is crisp and clear and comparable to reading text in a book. Also, as it's not constantly refreshed, the battery life is much longer than a laptop. Finally, the Kindle is extremely light and easy to hold, and can connect to Amazon's Whispernet to buy books without the need of a computer or Internet access. The Kindle is a great tool for anyone who enjoys reading.
On July 19, 2010, Amazon announced it was now selling more Kindle books than hardcover books.
Amazon.com released a more robust version of the regular Kindle e-book reader, called the Kindle Fire, on November 15, 2011. The Kindle Fire is a tablet, whereas the regular Kindle is only an e-reader. As a tablet, it is more powerful, featuring a dual-core or quad-core ARM processor, and is capable of playing music, movies, games, surfing the web, and running other applications. For web surfing, the device uses a browser named Amazon Silk.
The Kindle Fire allows you to store Amazon content for the device on their cloud servers. It runs on a version of the Android operating system from Google.