Why Apple is the most powerful ICT company today? Why interactive television has not worked in four decades of continuous attempts? Why do we have digital television but analogue radio? What role SMS messages play in contemporary social demonstrations?This books tries to answer these and other questions through eight case studies focused on the application of ICT in the field of communication. From the author's research and teaching experience, suceesses and failures are studied in their context using a sociocentric perspective, that is, analysing technology in its social, regulatory, political, economic, industrial and use context.