Stack Overflow is a website which is held privately. The site was created by Joel Spolsky and Jeff Atwood in 2008. The website name was chosen by readers of Coding Horror in April 2008. The site consists of wide range of question and answers on topics of computer programming. It is a platform for users to ask different questions and answers, through membership or by taking active participation. Users can vote the question and answers up and down and edit them similar to Digg or wiki. The site consists of more than 4,000,000 registered users and a more than 11,000,000 questions on its site. The site was launched on 15th September 2008.