Define special library?

A special library is a library that is focused on a specific subject area or serves the informational needs of a particular group of people. Special libraries are often found within organizations, such as businesses, government agencies, hospitals, or universities, and are typically used by employees or members of the organization. Special libraries may have a collection of materials that is specific to the organization’s field of expertise or to the needs of the users. For example, a special library at a hospital might have a collection of medical texts and electronic resources, while a special library at a university might have a collection of materials related to a particular academic discipline. Special libraries may also offer a variety of services, such as research assistance, to help users find and access the information they need.