The AWS Simple Storage Systems (S3) provides a safe and highly scalable object storage service. You can use this service to store any amount of data and restore it from anywhere. The system provides you with a versioning option, so you can roll back to any previous version of the files. Additionally, it provides the REST web services API, so you can access it from external applications.
When data comes to S3, S3 will create an object for it, and these objects will be stored inside Buckets (think of them like folders). You can provide a sophisticated user permission for each created bucket, and can also control its visibility (public, shared, or private). The bucket access can be either a policy or an Access Control List (ACL).
The bucket is also stored with metadata that describes the object in key-value pairs, which you can create and set by HTTP POST...
