Music librarianship is the area of librarianship that pertains to music collections an their development, cataloging, preservation and maintenance, as well as reference issues connected with musical works and music literature. Music librarians usually have degrees in both music and librarianship (typically, a Master of Library and Information Science and at least a college-level music degree). Music librarians deal with standard librarianship duties such as cataloging and reference, but the addition of music scores and recordings to collections complicates these tasks. Therefore, music librarians generally read music and have at least a basic understanding of both music theory and music history to aid in their duties.