A research library is a library which contains an in-depth collection of material on one or several subjects. A library is a collection of information sources resources and services and the structure in which it is housed it is organized for use and maintained by a public body an institution A research library will generally include primary sources as well as secondary sources. Primary source is a term used in a number of disciplines In Historiography, a primary source (also called original source) is a Document, Recording In Library and information science, Historiography and other areas of Scholarship, a secondary source is a Document or Recording Large university libraries are considered research libraries, and often contain many specialized branch research libraries.
Research libraries can be either reference libraries, which do not lend their holdings, or lending libraries, which do lend all or some of their holdings. A reference library does not lend books and other items instead they must be read at the Library itself A lending library is a Library from which books are lent out The earliest reference or use of the term 'lending library located in English correspondence dates back to at Some extremely large or traditional research libraries are entirely reference in this sense, lending none of their material; most academic research libraries, at least in the U. An academic library is a Library which serves an institution of higher learning such as a College or a University — libraries in secondary and primary S. , now lend books, but not periodicals or other material.