A special library is a library that provides specialized information and resources on a certain topic or subject area. There are various synonyms for a special library, including subject-specific library, research library, specialized library, information center, knowledge center, and reference library. These types of libraries exist in many different fields, such as law, medicine, art, music, and science. They are a valuable resource for researchers, scholars, and professionals who need access to in-depth, specialized information that may not be readily available in a general library. Special libraries offer unique collections and services, often including research assistance, database access, and interlibrary loan services, to support their specific needs and interests.