Carla Daniella Teixeira Girard Cristiane Marina Teixeira Girard SUMMARY Studies the origin of the model of open archive or open access (TO), definitions, accessibility, use, advantages and disadvantages. It analyzes the relevance of this model as a new alternative for the free access to the scientific, available information in electronic publications and databases, as well as its contribution to the progress of science for intermediary of the production of new knowledge. It adopts as methodology, the accomplishment of research with bibliographical, documentary survey and in database on-line, with intention to select the material, analyzing and contextualizando the essential parts. The research was carried through in books, periodic printed matters and dissertaes that approach the subject in the libraries of UFPA and UNAMA. It is distinguished, however, as periodic principal sources on-line, such as Science of the Information, Perspective in Science of the Information, Transinformao and Datagramazero, being distinguished, still, the Digital Libraries of the IBICT and the USP. It analyzes the information in its origin and conceptual evolution. It deals with the term scientific information showing its importance in the field of science. It discourses on the scientific communication in what it refers to the conceptual and historical boarding, its evolution and has detached as basic element for the sprouting of the open archive.

It in general turns on the use of the scientific communication in the world contemporary and its contribution for the members of the scientific community and the public. It shows the existence of cinereous literature, its concepts and presents its importance for science, approaching historical aspects and identifying the types of documents of that it treats this scientific literature. Word-key: Open archive. Open Access (TO). Scientific information. Scientific communication. Cinereous literature. 1 INTRODUCTION With the advent of the Technologies of the Information and Communication (TICs), providing a fast growth of the Internet, had discovered and creations that had contributed for a new social structure, with adequacy and evolution of models that they allow the efficient access and in timely way to the information desired for the users.