I have posted this image here for students of Digital Production Methods who are required to write an essay discussing the virtual, the possible, the actual and the real.

Source: Martina, V. 1996, ‘Cyberella: The Content Developer’ in Being On Line: Net Subjectivity, ed Sondheim, A., Lusitania Press, New York, pp. 193-201. Author acknowledges that the content of this article is drawn from Pierre Levy’s Qu’Est-Ce Que Le Virtuel?