Amazon Web Services (AWS), is a collection of cloud computing services that make up the on-demand computing platform offered by Amazon.com. These services operate from 12 geographical regions across the world. The most central and best-known of these services arguably include Amazon Elastic Compute Cloud, also known as "EC2", and Amazon Simple Storage Service, also known as "S3". AWS now has more than 70 services that range from compute, storage, networking, database, analytics, application services, deployment, management and mobile. Amazon markets AWS as a service to provide large computing capacity quicker and cheaper than a client company building an actual physical server farm.