Internet has been growing intensely for the last years. In its origins, Internet was a community with informal structures of reinforcement of merits. Its functioning was regulated by few norms. Today, economic practices of the whole society are operating in Internet too. Anarchy and self-organization disappear and are replaced by control. Internet is changing every human activity: work, personal, familiar. Generalized use of hypertexts and hypermedia affects the way knowledge is structured too. Psychologists are very interested in all of those developments and influences. Tkeir own way of work and investigate are influenced by those technological developments.