**2. "Information" in quantum information science: What does the word mean?**

Understanding the concept "information" is of importance to all the information disciplines. Perhaps for that reason, it is a term that has been defined in countless ways, over many areas in Quantum Information Science. It would be fair to say that there is no widely agreed-upon definition or theoretical conception of the term.

According to Luciano Floridi [2] the word "information" commonly refers to at least four kinds of mutually compatible phenomena:


These four phenomena commonly referred to by the word "information" are used so metaphorically or in such an abstract way that the meaning of the word "information" looks quite unclear. In spite of this lack of clarity in the meaning of information, Floridi was primarily concerned with efforts in rethinking and "reengineering" our societal concerns for "information" in the digital age.

Floridi's main interest in Quantum Information Science relates to the problems raised by analysis of "information" in two different areas:


In view of the lack of agreement about the definition of the term "information," as shown above, the main objective in Part 1, will be to lay out some of the major theoretical constructions giving rise to the classes of definitions of the term "information" that are currently or recently in use. What binds these theoretical constructions together is the claim that the technical notion of "information" can be specified only by using a purely mathematical and physical vocabulary. In what follows, we will discuss a few theoretical constructions.
