11.8 million UK users (The Guardian 2011) go online, whether at home, work or elsewhere . There are different types of Internet use, including use of non-interpersonal communications (e.g., entertainment) and use of interpersonal communications (e.g., use of email and social media). Among these Internet users, the average user spends 13 hours per week online. Of these 13 hours, the average user worldwide spent more than five and a half hours on social networks in December 2009, an increase of 200% compared to the same month in 2008. A social network is a social structure composed of individuals (or organizations). ) called "nodes", which are connected by one or more specific types of interdependence, such as friendship, common interests, financial exchanges, dislikes, sexual relationships, or relationships of beliefs or knowledge. Social networks, such as Facebook, Myspace, Twitter, etc., provide users with the opportunity to be part of an online network of friends that allows them to stay in touch with current friends, reconnect with old friends and/or create real friendships. by joining groups/forums of those who share the same interests. In addition to blogs and forums, SNS users can express themselves by designing their own Facebook profile page to reflect their individual personality. For these reasons and more, 110 million Americans, or 60% of the online population, use social media. Over the years, various research has sought to uncover the many ways in which personality can affect an individual's media usage habits, particularly on the Internet or online (Hall, 2005). This could be due to the assumption that people behave differently in different social situations. These differences may affect how and why they use the paper-based computational research environment. Lecture Notes in Computer Science, 5075, 392-400. Buffardi, LE and Campbell, WK (2008). Websites about narcissism and social media. Personality and Social Psychology Bulletin, 34, 1303-1314. John, OP, Naumann, LP, & Soto, CJ (2008). Paradigm shift towards the integrative taxonomy of the big five traits: history, measurement and conceptual issues. In OP John, RW Robins, & LA Pervin (Eds.), Handbook of personality: Theory and research (pp. 114–158). New York, NY: Guilford Press. Raskin, R. and Terry, H. (1988). A principal components analysis of the Narcissistic Personality Inventory and additional evidence for its construct validity. Journal of Personality and Social Psychology, 54(5). Papacharissi, Z. and Rubin, A.M. (2000). Predictors of Internet use [Electronic version]. Journal of Broadcasting and Electronic Media, 44, 175–196.