This document discusses the definitions of libraries and librarians. It defines a library as a collection of books and materials organized for use by an institutional clientele that is staffed by librarians. A librarian is defined as a professionally trained person responsible for the care of a library including selecting, organizing, and providing access to materials and information to meet user needs. The definition notes librarians in the US require an MLS degree and there is variation in how the role is applied from administrators to professionals.