The Dewey system was developed in 1876 by Melvil Dewey and allows unlimited expansion capabilities and cataloging usually always different subjects and in different physical locations. This system allows smaller libraries to use broader categories, while keeping the whole system in general the same in all libraries.
The first half of the 20th century dominated by the use of the SDC began in the 1960s, but a change, rather than fail to use the Library of Congress classification because of the realization that Dewey has been in two respects. The first is that they do not handle inter-library sharing with Pound at two different locations, and the second was that new issues are not simply inserted into the catalog without major changes to the system. The subjects were chosen long ago, and many new books are adapted into a few categories. The courses offered are not all have common interests, as they did before.
The Library of Congress classification over time and was more than one person as the Dewey system was generated, and all at once. The first part of the LC system was developed in 1898. The LC system of 21 major classes, no letter that I represent is composed, O, W, X and Y. A second letter used to specialize the issue further and even a third letter is used in the law class. After the third letter and use a decimal point is an infinite number of categories can be used.
Another classification of the Universal Decimal Classification (UDC) is mainly in Europe, Japan, Russia, uses, and Latin America. This system has been done on the fifth edition of the Dewey Decimal Classification and was introduced in 1895 by bibliographers Paul Otlet and Henri La Fontaine. This classification was different in that it was used primarily for identifying content of a document not only the position of the SDC as documents and is predominantly used.
catalogs were between 16 and 18 Century popular. This was to produce portable and inexpensive, but difficult to update. Replaced book card catalogs catalogs in the late 19th Century. These initiatives are already popular in the 1990s. Three types of maps were generally used for each item in the library. The first type is the name of the author in the first row. The second type has the title in the top row. The third type has been the subject of the article on the top line. Card catalogs were higher catalogs that could be in more than one person to use both, and new entries were simply integrated into the drawers. It was even easier to use, when in 1901 the Library of Congress, the sale of copies of its catalog cards to other libraries began. There were 5,738 subscribers to the card in 1935.
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