“What is colour?”, “What is the precise meaning of the statement ‘the stock exchange closes at a 5% drop this evening’?”, “How are TV viewers defined?”, or “How can images produce meaning?” Such everyday questions are examined in this book. To make our analysis intuitive and understandable, numerous concrete examples illustrate our theoretical framework and concepts. The examples include gaming, fictional skits in leisure entertainment, and enigmas. The golden thread running through the text revisits the informational process and places the datum as its pivot.