Amazon S3 (Simple Storage Service) is an online storage web service offered by Amazon Web Services. Amazon S3 provides storage through web services interfaces (REST, SOAP, and BitTorrent). S3 comes with a 99.9% monthly uptime guarantee
It sounds strange, but the IT director of Amazon (the leading cloud platfrom provider) Jennifer Boden is not a fan of cloud computing, like her boss, Jeff Bezos. She looks at the cloud carefully and rationally. That is why, the Amazon's IT infrastructure is still moved to AWS only partially. Moreover, the company did not move in this direction until last year when Amazon VPC (Virtual Private Cloud), which allows to separate an enterprise cloud from the public cloud, appeared. Nevertheless, the process is started, and now Jennifer is speaking at the IT event with the presentation (see above) about how Amazon moves to Cloud Computing. Note that it this concerns not the Amazon's online store but the in-house enterprise apps, like email, financial software, IT management, HRM, etc.