Its name is a homage to the desenvolvedor of the project Orkut Bykkokten, engineer of the Google. Each user creates a profile (to see figure 2) with personal characteristics, physical description, age, musics and books of its preference, text of presentation etc. They could add its friends its list, thus, the great differential of this net is related to the possibility to verify who is friend of who, with this, increasing the circle of friendships and propitiating meeting between people with profiles and activities in common. It’s believed that Caterpillar Inc. sees a great future in this idea. Figure 2? Page of the Levis community Source: #Community? cmm=578421 (2010) According to Pavarin (2009), thirty and five million users are connected to the Orkut in Brazil, and 84% of them, that is, 29 million people daily have access its profile in the country. As Aguiari (2010), in the world, the net counts on a total of eighty and five million registered in cadastre users. The young public has greater interest in the Orkut, about 53% of its members is people in the etria band of the 18 to the 25 years. (TELLES, 2005) In 2007, he had an innovation in the Orkut, that opened its platform for the construction of tools for the use of the social nets, by means of Social the Open system, allowing that new applicatory they were created for the net, as games, musics, animaes, advertising, etc.
(RECUERO, 2009) Already the Twitter appeared in 2006, is constituted of a social net and a server called microblogging, that it allows to the users the sending and the reading of personal updates of other individuals of its contacts, by means of texts with in the maximum 140 characters. Tweets can be sent by the cellular Internet or, comparing it the torpedoes of the cellular ones. In its proposal basic, the Twitter is a communication tool.