Well, it is generally the term for outsourcing business software programming business and trade services to outworkers or contractors situated in foreign nations along with cheap cost of labour. Outsourcing is considered as an advance trend in globalism wherein business ventures together on a mutual expertise ground for jointly totting up long-term value. Determine the duration of commitment enabling you to retain the control of your applications, data and system software. Data center outsourcing solutions are cost effective meeting the changes in business demands, help protect the current technology investment and sustain business growth. Whether there is a rapid seasonal increase in data processing, outsourcing services will still help you in aligning your business needs supporting legacy systems even the client or server migrates for the successful achievement of business goals. It is a familiar term, especially for those American corporations who rely more on the capability of other people who do not belong inside their organization. As an overview, offshore outsourcing is the hiring of services of an external organization or entity to execute partial or full business functions in a country apart from the one where a product or service will be sold or consumed. To buy a product from someone else and sell it to others is not outsourcing, it is mere a relationship of a buyer and a vendor. Outsourcing involves an in-depth communication process of both the lead contractor and the subcontractor. Failure of the subcontractor to meet the lead contractor s directives would mean breakdown of everybody. The top five among the list are: 1. IBM provides Information Technology and Business Process outsourcing services. 2. Sodexho Alliance gives off environmental services and services related to real estate and capital asset management. 3. Accenture - serves Business Process Outsourcing, Information Technology Outsourcing and Financial Management. This is due to the high salary that is offered in Call centers. Typically, the salary they are getting here is much more than the salary they will gain from other companies, especially in third world countries. 3. It also boosts the offshore capability. From merely having the simple transaction outsourcing opens a gate for multi-national companies around the world.