The Amazon Kindle Books is a series of e-readers designed and marketed by Amazon. Amazon Kindle devices enable users to browse, buy, download, and read e-books, newspapers, magazines and other digital media via wireless networking to the Kindle Store.
The hardware platform, which Amazon subsidiary Lab126 developed, began as a single device in 2007 and now comprises a range of devices, including e-readers with E Ink electronic paper displays and Kindle applications on all major computing platforms. All Kindle devices integrate with Kindle Store content and, as of March 2018, the store had over six million e-books available in the United States.
On January 21, 2010, Amazon announced the release of its Kindle Development Kit (KDK).KDK aims 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 gives sample code, documentation and a Kindle Simulator together with a new revenue sharing model for developers.The KDK is based on the Java programming language’s Personal Basis Profile packaged Java APIs.
As of May 2014 Kindle store offered over 400 items labeled as active content. These items include simple applications and games, including a free set provided by Amazon Digital Services. As of 2014, active content is only available to users with a U.S. billing address.
In October 2014, Amazon announced that the Voyage and future e-readers would not support active content because most users prefer to use apps on their smartphones and tablets, but the Paperwhite first-generation and earlier Kindles would continue to support active content.