Facebook is a social networking website launched in 2004 that has grown tremendously in users and economic impact. It started at Harvard but expanded to other universities and later anyone aged 13 and older. Currently it has over 110 million active users worldwide who spend on average 20 minutes per day on the site. Financially, Facebook's revenue was estimated at $150 million in 2008 and Microsoft invested $240 million in 2007, increasing Facebook's value to $15 billion. Facebook has become one of the leading social sites and is used by people around the world to keep in touch with friends and family or for business purposes. While it allows users to connect and create communities, it also raises privacy issues through sharing of photos and personal information.

1. Facebook. Hello ! a presentation given by INALI

2. Introduction : Facebook, is a new innovation. It offers you an opportunity to interact with an extraordinarily expansive universe of new people.You can sculpt your on-line identity and learnmore about how the Internet and its various programs work to create new relationships andcommunities. For the entrepreneurially minded, it might be an introduction into business as youthink of how to "market" yourself

3. I/ Description of the concept Facebook is a social networking website launched on February 4, 2004. The Facebook headquarter sets place in Palo Alto (California). Mark Zuckerberg, Dustin Moskovitz and Chris Hughes founded Facebook while they were students at Harvard University. Website membership was initially limited to Harvard students, but was expanded to other colleges in the Ivy League. It later expanded further to include any university student, then high school students, and, finally, to anyone aged 13 and over.

4. The website currently has more than 110 million active users worldwide including 16 million users in Europe (1million in France since the site is launched here in May 2007!). Other data, the number of users in October 2007 is on average of 50 million, 60 percent of the connections are daily and an important precision is that more than the half of users consulting daily www.facebook.com stays on average twenty minutes!

5. II/Economy and technology We can give some important figures about the economy of facebook. The facebook’s turnover was estimated in 2008 at 150 million dollars. Moreover, 1.6 percent of the capital was bought back by Microsoft in October 2007 for 240 billion dollars which increase the value of the society at 15 billion dollars! Beside Microsoft becomes the only advertising provider of facebook.

6. III/ Social Impact Facebook has become one of the leading social networking sites on the Internet today. It is used by millions of people around the world; there are high school students, college students, family members and friends using this tool to simply keep in touch with one another, while other people have come to use Facebook for business purposes.

7. Conclusion : Facebook is a great innovation that allows users to express their humanity, meet new or former friends and an opportunity to create new communities. It represents a forum in which one can make choices about their identity. That freedom does not suggest that one can do so without consequences. Facebook is a great way to contact former friends, to create applications, to send messages… But it can also be a non privacy with applications like photo, personal information…