Since 2006 Amazon Web Services has been offering web services commonly known as cloud computing. AWS Provides a reliable, low cost infrastructure platform that powers hundreds of thousands of businesses.
Amazon S3 API, the Simple Storage Service provides a simple web services interface used to store objects using the Amazon online storage infrastructure. Users can then download the data or use the data with other AWS services, such as Amazon Elastic Cloud Computer (EC2). Using this web service, developers can build applications that make use of Internet storage.
The API uses Buckets, Objects, Keys and Operations. An object has four parts: value, key, metadata, and an access control policy. Objects are stored in buckets. The API is available in both REST and SOAP protocol. Responses are formatted in XML.