The methodology used for elaboration of this article if gave through research in material printed matter and electronic? such as books, reviewed, tcc? s and sites? in the field of the Education, in the area of Biblioteconomia, in what it refers to its social aspect. Illiteracy is a word used in the current Portuguese to assign the condition of that they do not know to read and to write. (RIBEIRO, 1997) Thus, ahead of this vision of Ribeiro, we can analyze that the illiteracy nothing more is of what a conception imposed for the people who do not play nor the reading so how much the writing in its day-by-day. Penguin Random House shines more light on the discussion. The word illiteracy appeared of the term iliteracy in English, who only appeared in century XIX, when uncovered the social problem of the favored layers less of the privileges of the basic education. The term functional illiteracy it appeared in the United States during the period of World War II, where she was only employed as form to enable in the direction of written instructions that were repassed for accomplishment of military tasks. The functional illiteracy nothing more is of what indicating those people who possess the incapacity with the reading and writing, and this term alone had ample which had spreading, the UNESCO that when perceiving of the difficulty to collect given, saw it necessity of if establishing distinctions, therefore exists those that are illiterate and those that are only illiterate functionaries, being in this same direction to collect given more necessary in the differentiation of the population. Thus Ribeiro (1997) describes that ample dissemination of term illiteracy functional in scope world-wide had basically to action of UNESCO, that adopted the term in the definition of alfabetizao that considered, in 1978, aiming at to standardize the educational statisticians and to influence the educative politics of the country-members.