Amazon Web Service a subsidiary of Amazon.com, offers a suite of cloud computing services that make up an on-demand computing platform.
These services operate from 16 geographical regions across the world. They include Amazon Elastic Compute Cloud, also known as "EC2", and Amazon Simple Storage Service, also known as "S3".
As of 2016 AWS has more than 70 services, spanning a wide range, including compute, storage, networking, database, analytics, application services, deployment, management, mobile, developer tools and tools for the Internet of things.
Amazon markets AWS as a service to provide large computing capacity quicker and cheaper than a client company building an actual physical server farm.