Portal:Library and information science
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The Library and Information Science Portal Library science and information science are two closely-related and often intersecting disciplines that deal primarily with the organization and retrieval of information. Library science is an interdisciplinary social science that incorporates the humanities, law and applied science to study topics related to libraries; the collection, organization and dissemination of information resources; and the political economy of information. Library science has also historically included archival science, although a conceptual distinction between libraries and archives has evolved over time. Amongst the varied topics of study that fall within library science: how information resources are organized to serve the needs of select user groups; how people interact with classification systems and technology; how information is acquired, evaluated and applied by people in and outside of libraries as well as cross-culturally; how people are trained and educated for careers in libraries; the ethics that guide library service and organization; the legal status of libraries and information resources, and the applied science of computer technology used in documentation and records management. Library science is constantly evolving, incorporating new topics like database management, information architecture and knowledge management.  Information science (also referred to as information studies) is an interdisciplinary science primarily concerned with the collection, classification, manipulation, storage, retrieval and dissemination of information. Information science studies the application and usage of knowledge in organizations, and the interaction between people, organizations and information systems. It is often, though not exclusively, studied as a branch of computer science or informatics and is closely related to the cognitive and social sciences.
The Library of Congress Subject Headings (LCSH) comprise a thesaurus (in the information technology sense) of subject headings, maintained by the United States Library of Congress, for use in bibliographic records. LC Subject Headings are an integral part of bibliographic control, which is the function by which libraries collect, organize and disseminate documents. LCSHs are applied to every item within a library’s collection, and facilitate a user’s access to items in the catalogue that pertain to similar subject matter. If users could only locate items by ‘title’ or other descriptive fields, such as ‘author’ or ‘publisher’, they would have to expend an enormous amount of time searching for items of related subject matter, and undoubtedly miss locating many items because of the ineffective and inefficient search capability. The Subject Headings are published in five large red volumes, which are typically displayed in the reference sections of research libraries. They may also be searched online in the Library of Congress Classification Web, a subscription service, or free of charge at Library of Congress Authorities. The Library of Congress issues weekly updates. Once a library user has found the right subject headings, they are an excellent resource for finding relevant material in your library catalogue.
 Pearl achieved broader fame with Book Lust: Recommended Reading for Every Mood, Moment and Reason, (2003) her guide to good reading, and the sequel More Book Lust (summer 2005) with the same subtitle, which received much acclaim ("a sprightly follow-up"), and was chosen by the Today Show as one of their book-club selections. As of 2006, she is working on a book of recommendations for children and teens to be called Book Crush. Pearl's approach to enjoying reading is the Rule of 50 which states "If you still don't like a book after slogging through the first 50 pages, set it aside. If you're more than 50 years old, subtract your age from 100 and only grant it that many pages."
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