Universal library

A universal library is a library with universal collections. This may be expressed in terms of it containing all existing information, useful information, all books, all works (regardless of format) or even all possible works. This ideal, although unrealizable, has influenced and continues to influence librarians and others and be a goal which is aspired to. Universal libraries are often assumed to have a complete set of useful features (such as finding aids, translation tools, alternative formats, etc.).

The Library of Alexandria is generally regarded as the first library approaching universality, although this idea may be more mythical than real. It is estimated that at one time, this library contained between 30 and 70 percent of all works in existence. The re-founded modern library has a non-universal collections policy.

As a phrase, the "universal library" can be traced back to the naturalist Conrad Gessner's Bibliotheca universalis of 1545.

In the 17th century, the ideal of universality continued to be attractive. The French librarian Gabriel Naudé wrote:

And therefore I shall ever think it extremely necessary, to collect for this purpose all sorts of books, (under such precautions, yet, as I shall establish) seeing a Library which is erected for the public benefit, ought to be universal; but which it can never be, unlesse it comprehend all the principal authors, that have written upon the great diversity of particular subjects, and chiefly upon all the arts and sciences; [...] For certainly there is nothing which renders a Library more recommendable, then when every man findes in it that which he is in search of ...

Science fiction has used the device of a library which is universal in the sense that it not only contains all existing written works, but all possible written works. This idea appeared in Kurd Lasswitz's 1901 story "The Universal Library" and Borges's essay "The Total Library" before its more famous expression in Borges's story "The Library of Babel". Such a library, however, would be as useless as it would be complete. A similar idea was a planet called Memory Alpha, (from the Star Trek episode "The Lights of Zetar") which was the Federation's "storehouse of computer databases containing all cultural history and scientific data it has acquired.". It has been commented that the Internet already approaches this state.

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