This book describes how young people in the Teeside area of England used the Internet and mobile phones for social purposes, from research undertaken from 2001 to 2005. Among the book's findings are that there was a small bias towards male use of and competence with the Internet and a small bias towards female use of mobile phones. Non-use of the Internet was often due to a lack of access to facilities, and non-use of mobile phones because of a perceived lack of need for this technology. Relationships between social anxiety and social phobia and young people s use of the Internet and mobile phones are also explored. Associations between these conditions and use of these technologies, generally, and for communication purposes, were found to be minimal but research also showed that control over interactions might be one important reason that young people like to use text- based Internet and mobile phone communication media to interact.