Linkedln
Linkedin is a Social Networking Web site for business oriented people and mainly used for professional networking. In order to become member of Linkedin users have to register themselves then only they will get the privileges of website like maintaning contact details of people they know and trust in business. The people in the list are known as Connections. In order to make a connection users can invite anyone they want to.

Linkedin has more than 15 million registered users, the features of websites include finding jobs, people and business opportunities recommended by anyone in users contact network. Job seekers can even look for the profile of hiring manager and discover which of there contacts can help them to introduce. Linkedin also provide an option where employer can list jobs and can look for deserving candidates. One of the latest feature added to linkdln is linkedln Answers which provides an option of asking question for community to answer.