The following sections deal with the two separate terms that make up the idiom.
Virtual
The term virtual was coined by IBM when it introduced a virtual memory device. This subsequently led to the creation of such idioms as virtual reality and virtual community (Rheingold, 1991; Rheingold, 1993).
Virtual communities are social aggregations that emerge from the Net when enough people carry on those public discussions long enough, with sufficient human feeling, to form webs of personal relationships in [...] the conceptual space where words, human relationships, data, wealth, and power are manifested by people using CMC [computer mediated communication] technology. (Rheingold, 1993)
Despite this original definition, the notion remains vague. One of its common sense meanings is similar to simulation. According to this meaning, the virtual is opposed to the reality. A second meaning describes how, with cognitive artifacts, information is no longer attached to a support; the virtual then refers to disembodiment, as opposed to materiality. A third (philosophical) meaning defines the virtual as what could be actualized. As a matter of possibilities and becomings, the virtual is then opposed to the actual (Deleuze & Parnet, 2002).
Some Internet analysts oppose the virtual to categories. According to them (Lévy, 1998; Lévy, 2000), categories are about frontiers, whereas the virtual is about crossing barriers. Categories thus resemble clear-cut and impermeable containers or classes that delimit, divide or enclose. Inherited from the past, they are structures that determine history once and for all. Reticular ideology (Parrochia, 1993) breaks with such a tradition: interactions are more likely to actualize on-line, in an open, liberated way, similar to the horizontal, immanent, continuously moving relations enabled by hypertext.