General works, Computer science and Information

ARK Sachkatalog (1501-1955) der Staatsbibliothek zu Berlin

"Der Alte Realkatalog (ARK) wurde im 19. Jahrhundert als Bandkatalog angelegt und erschließt rund drei Millionen Titel, die zwischen 1501 und 1955 erschienen sind, nach inhaltlich-sachlichen Kriterien. In einem mehrjährigen Projekt wird die Systematik dieses Sachkataloges für den umfangreichsten historischen Druckschriftenbestand in einer deutschen Bibliothek vollständig aufbereitet, elektronisch erfasst und online zur Verfügung gestellt."

"The Old Realkatalog (ARK) was created as a band catalog in the 19th century and opens up around three million titles, published between 1501 and 1955, according to substantive and objective criteria.
In a multi-year project, the systematics of this catalog for the most comprehensive historical print stock in a German library are completely processed, electronically recorded and made available online. "

Library of Congress Genre/Form Terms

"The Library of Congress Genre/Form Terms for Library and Archival Materials (LCGFT) is a thesaurus that describes what a work is versus what it is about. For instance, the subject heading Horror films, with appropriate subdivisions, would be assigned to a book about horror films. A cataloger assigning headings to the movie The Texas Chainsaw Massacre would also use Horror films, but it would be a genre/form term since the movie is a horror film, not a movie about horror films.

Library of Congress Children's Subject Headings

"The Library of Congress Subject Headings Supplemental Vocabularies: Children’s Headings (LCSHAC) is a thesaurus which is used in conjunction with LCSH. It is not a self-contained vocabulary, but is instead designed to complement LCSH and provide tailored subject access to children and young adults when LCSH does not provide suitable terminology, form, or scope for children. LCSHAC records can be identified by the LCCN prefix 'sj'."

Library of Congress Name Authority File

"The Library of Congress Name Authority File (NAF) file provides authoritative data for names of persons, organizations, events, places, and titles. Its purpose is the identification of these entities and, through the use of such controlled vocabulary, to provide uniform access to bibliographic resources. Names descriptions also provide access to a controlled form of name through references from unused forms, e.g.