A library is a collection of materials, books or media that are accessible for use and not just for display purposes.A library, which may vary widely in size, may be organized for use and maintained by a public body such as a government. Library buildings often provide quiet areas for studying, as well as common areas for group study and collaboration, and may provide public facilities for access to their electronic resources, for instance, computers and access to the Internet.Academic libraries are libraries that are hosted in post-secondary educational institutions, such as colleges and universities.