From the Amazon website:
Amazon.com, Inc. (NASDAQ: AMZN), a Fortune 500 company based in Seattle, opened on the World Wide Web in July 1995 and today offers Earth's Biggest Selection. Amazon.com, Inc. seeks to be Earth's most customer-centric company, where customers can find and discover anything they might want to buy online, and endeavors to offer its customers the lowest possible prices.
Amazon.com and other sellers offer millions of unique new, refurbished and used items in categories such as books, movies, music & games, digital downloads, electronics & computers, home & garden, toys, kids & baby, grocery, apparel, shoes & jewelry, health & beauty, sports & outdoors, and tools, auto & industrial.
Amazon Web Services provides Amazon's developer customers with access to in-the-cloud infrastructure services based on Amazon's own back-end technology platform, which developers can use to enable virtually any type of business. Examples of the services offered by Amazon Web Services are Amazon Elastic Compute Cloud (Amazon EC2), Amazon Simple Storage Service (Amazon S3), Amazon SimpleDB, Amazon Simple Queue Service (Amazon SQS), Amazon Flexible Payments Service (Amazon FPS), and Amazon Mechanical Turk.