Amazon Web Services (AWS) provides on-demand computing resources, storage, databases, and application services that enable customers to run virtually anything in the cloud. Key features include paying for only what is used, ability to grow and shrink resources as needed, and short lead times for standard applications. AWS offers a variety of services including virtual servers, storage, databases, load balancing, networking, and developer tools. Popular companies like Pinterest, Netflix, and Flipboard have built their infrastructure on AWS. An example use case is hosting an iPhone app using EC2 for computing, S3 for storage, RDS for databases, CloudFront as a content delivery network, and Simple Queue Services for distributing processing. Managing AWS requires expertise in security