Library is a collection of resources, resources and services, and it is also the structure in which it is located; It is used and maintained by public organizations, institutions or individual organizations. In a more traditional sense, a library is a collection of books. It can refer to a collection, a building or room that houses such a collection, or both. The word "library" itself has a second meaning: "a batch of useful materials for the public." This feeling is used in computer science, mathematics, statistics, electronics and biology. Publishers can also use it to name a series of related books, such as the British Catholic Theological Library. Libraries often provide a quiet place for study.

Collections and services of public institutions may be prepared for those who choose not to buy or cannot afford to buy a large collection, those who need information that no one has, or those who need professional help in research. In addition to providing information, the library also provides the services of librarians, who are experts in finding and organizing information and explaining information needs.

However, with the collection and collection of media for storing information and media other than books, many libraries are now repositories and access points for maps, printed matter or other documents and various storage media, such as microfilm (microfilm/microfilm), audio tapes, CDs, tapes, videos, DVDs and video games. Libraries can also provide public facilities for accessing subscription databases and the Internet.

Therefore, modern libraries are increasingly redefined as places where information of various formats and sources can be obtained without restriction. They are understood to extend beyond the physical walls of buildings, including materials that can be accessed by electronic means, and to help librarians in navigating and analyzing a large amount of information by using various digital tools.