Based on a brief overview of the history of ontology and on some philosophical problems of virtual reality, a new approach to virtuality is proposed. To characterize the representational technologies in the Internet age, I suggest that Aristotle’s dualistic ontological system be complemented with a third form of being: virtuality. In the virtual form of being actuality and potentiality are inseparably intertwined. Virtuality is potentiality considered together with its actualization. In this view, virtuality is reality with a measure, a reality (...) which has no absolute character, but which has a relative nature. This situation can remind us the emergence of probability in the 17th century: then the concept of certainty, now the concept of reality is reconsidered and relativized. Currently, in the descriptions of the world created by representational technologies, there are two coherent worldviews with different ontologies: the world is inhabited by actual and potential beings—or all the beings in the world are virtual. (shrink)