E-Commerce: The buying and selling of goods or services using the internet, and the transfer of money and data to execute these transactions. This is what Amazon specializes in.
Amazon Prime: A paid subscription service offered by Amazon that gives users access to services that would otherwise be unavailable or cost extra to the typical Amazon customer. This includes free two-day delivery and music and video streaming services.
Kindle: An e-reader device designed and marketed by Amazon which allows users to browse, buy, download and read e-books, newspapers, magazines and other digital media via wireless networking to the Kindle Store.