library

library, traditionally, collection of books used for reading or study, or the building or room in which such a collection is kept. The word derives from the Latin liber, “book,” whereas a Latinized Greek word, bibliotheca, is the origin of the word for library in German, Russian, and the Romance languages.

From their historical beginnings as places to keep the business, legal, historical, and religious records of a civilization, libraries have emerged since the middle of the 20th century as a far-reaching body of information resources and services that do not even require a building. Rapid developments in computers, telecommunications, and other technologies have made it possible to store and retrieve information in many different forms and from any place with a computer and a telephone connection. The terms digital library and virtual library have begun to be used to refer to the vast collections of information to which people gain access over the Internet, cable television, or some other type of remote electronic connection.

This article provides a history of libraries from their founding in the ancient world through the latter half of the 20th century, when both technological and political forces radically reshaped library development. It offers an overview of several types of traditional libraries and explains how libraries collect, organize, and make accessible their collections. Further discussion of the application of the theory and technology of information science in libraries and related fields is included in the article information processing.

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The changing role of libraries

Libraries are collections of books, manuscripts, journals, and other sources of recorded information. They commonly include reference works, such as encyclopaedias that provide factual information and indexes that help users find information in other sources; creative works, including poetry, novels, short stories, music scores, and photographs; nonfiction, such as biographies, histories, and other factual reports; and periodical publications, including magazines, scholarly journals, and books published as part of a series. As home use of records, CD-ROMs, and audiotapes and videotapes has increased, library collections have begun to include these and other forms of media, too.

Libraries were involved early in exploiting information technologies. For many years libraries have participated in cooperative ventures with other libraries. Different institutions have shared cataloging and information about what each has in its collection. They have used this shared information to facilitate the borrowing and lending of materials among libraries. Librarians have also become expert in finding information from on-line and CD-ROM databases.

As society has begun to value information more highly, the so-called information industry has developed. This industry encompasses publishers, software developers, on-line information services, and other businesses that package and sell information products for a profit. It provides both an opportunity and a challenge to libraries. On the one hand, as more information becomes available in electronic form, libraries no longer have to own an article or a certain piece of statistical information, for example, to obtain it quickly for a user. On the other hand, members of the information industry seem to be offering alternatives to libraries. A student with her own computer can now go directly to an on-line service to locate, order, and receive a copy of an article without ever leaving her home.

Although the development of digital libraries means that people do not have to go to a building for some kinds of information, users still need help to locate the information they want. In a traditional library building, a user has access to a catalog that will help locate a book. In a digital library, a user has access to catalogs to find traditional library materials, but much of the information on, for example, the Internet can not be found through one commonly accepted form of identification. This problem necessitates agreement on standard ways to identify pieces of electronic information (sometimes called meta-data) and the development of codes (such as HTML [Hypertext Markup Language] and SGML [Standard Generalized Markup Language]) that can be inserted into electronic texts.

For many years libraries have bought books and periodicals that people can borrow or photocopy for personal use. Publishers of electronic databases, however, do not usually sell their product, but instead they license it to libraries (or sites) for specific uses. They usually charge libraries a per-user fee or a per-unit fee for the specific amount of information the library uses. When libraries do not own these resources, they have less control over whether older information is saved for future use—another important cultural function of libraries. In the electronic age, questions of copyright, intellectual property rights, and the economics of information have become increasingly important to the future of library service.

Increased availability of electronic information has led libraries, particularly in schools, colleges, and universities, to develop important relationships to their institutions’ computer centres. In some places the computer centre is the place responsible for electronic information and the library is responsible for print information. In some educational institutions librarians have assumed responsibility for both the library collection and computer services.

As technology has changed and allowed ever new ways of creating, storing, organizing, and providing information, public expectation of the role of libraries has increased. Libraries have responded by developing more sophisticated on-line catalogs that allow users to find out whether or not a book has been checked out and what other libraries have it. Libraries have also found that users want information faster, they want the full text of a document instead of a citation to it, and they want information that clearly answers their questions. In response, libraries have provided Selective Dissemination of Information (SDI) services, in which librarians choose information that may be of interest to their users and forward it to them before the users request it.

The changes in libraries outlined above originated in the United States and other English-speaking countries. But electronic networks do not have geographic boundaries, and their influence has spread rapidly. With Internet connections in Peking (Beijing), Moscow, and across the globe, people who did not have access to traditional library services now have the opportunity to get information about all types of subjects, free of political censorship.

As libraries have changed, so, too, has the role of the librarian. Increasingly librarians have assumed the role of educator to teach their users how to find information both in the library and over electronic networks. Public librarians have expanded their roles by providing local community information through publicly accessible computing systems. Some librarians are experts about computers and computer software. Others are concerned with how computer technologies can preserve the human cultural records of the past or assure that library collections on crumbling paper or in old computer files can still be used by people many centuries in the future.

The work of librarians has also moved outside library walls. Librarians have begun to work in the information industry as salespeople, designers of new information systems, researchers, and information analysts. They also are found in such fields as marketing and public relations and in such organizations as law firms, where staffs need rapid access to information.

Although libraries have changed significantly over the course of history, as the following section demonstrates, their cultural role has not. Libraries remain responsible for acquiring or providing access to books, periodicals, and other media that meet the educational, recreational, and informational needs of their users. They continue to keep the business, legal, historical, and religious records of a civilization. They are the place where a toddler can hear his first story and a scholar can carry out her research.