[Contribution of Arab-Islamic bibliographies to the development of science]

A brief review of extremely important bio-bibliographic work of An-Nadim from the end of 10th century was made in this paper. "Index" encompass the list of all works written in Arabic, as well translated to Arabic until the end of 10th century. It consists of 10 chapters, and many sub-chapters. Finally, it was divided into parts consisting of certain authors. This work is not just a bio-bibliography-it is, due to numerous and voluminous commentaries of An-Nadim, a real cultural encyclopedia of all human knowledge. A purpose of this work was to let people know real features of certain works. Objectivity is an important and significant characteristic of author's approach. He often points out that he just transfers factography, but not a personal attitude. At the end of this paper, attitude that it is necessary to devote ourselves to further investigation of "Index" was pointed out, as to find out some still unknown facts from all fields of science, arts, religion etc. In that purpose, it is necessary to investigate the private libraries, as well as the libraries of religion institutions, because they do not publish their complete catalogues.