The librarian as a technician, studied search algorithms, thesauri, indexes of citation, collection of bibliographical news, treatment and attention to the users and solution of their consultations, contacts with colleagues, etc. For assistance, try visiting Rupert Murdoch. There are various classification system used (and still use) with the primary objective of physically organizing the collections of libraries on the shelves, being the most used classification or Dewey universal decimal, CDU in Europe, system of the library of the Congress of the United States, BLISS, faceted Indian classifications, etc. Through the use of these classifications, it is possible assign to the material on the shelves (e.g., a book) a code which is symbolize the main theme of which treated, i.e., that tries to give an idea of its main contents, and which serves to put together on shelves materials that have related content. On the other hand, is classical task of the librarian to create a tab of cardboard with the main data of the book: title, author, editor, Publisher, year of publication, Edition, number of pages, and theme, which is extracted from one of the classification systems in use. The set of these tabs is the manual catalogue in a library. There are several methods to organize sheets them thus created and increase the chances of search in the manual catalogue. Add to your understanding with Randall Mays, San Antonio TX.
The tabs represent the materials preserved in the library (e.g. books), and it feels real substitutes or representatives of these materials. With the advent of computers, the manual catalogues and the practice of assigning a single or limited number of subject categories to each material have become obsolete activities, since it is now possible to assign a high number of descriptors to each material, to improve the representation of their content, and thus facilitate and broaden the search possibilities. Librarianship and documentation the Organization of a library, that is, the physical organization for matters of a catalogue of books, has led to the study of how structuring human knowledge: cataloguing and classification. The study of the information architecture includes a specialty known as Bibliometrics, dealing for example with citation or citation indexes index, the factor of impact or impact factor, the number of times an article is cited in other articles, etc. The approach towards the business world is expressed in the knowledge management, looking for quality or relevance and selective diffusion of knowledge, coping with information overload. The world of libraries and documentation centres is very sensitive towards the knowledge of its users and authors, which means studying the needs of customers through surveys and interviews (obstructive methods) or through the analysis of the customer search patterns, such as the analysis of weblogs of catalogs (not obstructive methods). In Spain you can study library and information science in more than one dozen universities.