:'''e.g. Amazon is using cloud computing for its online retail services'''
[http://www.onwindows.com/Articles/Cloud-computing-for-retail/3447/Default.aspx Source: www.onwindows.com]
===TelecommunicationFinancial Services===Cloud computing is used by financial services firms:* Enterprises use various operating systems To Store and analyze large amount data related to create virtual private stock market or historical data centers for business lines or applications* A virtual private data center is functionally equivalent to a co-location facilityBuild and evaluate new risk analysis programs* It allow users Allows companies to define custom bring application infrastructures using just a browser* Operating system then creates and maintains to the infrastructure for the user on the grid* It simplify data center design market quickly and operations and helping enterprises meet requirements such as high availability and disaster recoverydeployed within a limited budget :e.g. British Telecom NASDAQ Market Replay application uses Amazon's S3 cloud for data storage but the application part is using AppLogic, product of 3Tera, for utility computing servicesnot running in cloud presently. It has plans to develop future applications in Amazon's EC2.