Library of Congress Classification
The Library of Congress Classification ( LCC) is a classification that was developed at the Library of Congress. It is used for research institutions and university libraries in the U.S. and several other countries. Most public libraries use the Dewey Decimal Classification system instead ( DDC) or custom taxonomies.
The LCC was originally developed in 1897 by Herbert Putnam, with the support of Charles Ammi Cutter, before he took over the management of the Library of Congress. She is influenced by Cutter Expansive Classification, DDC, and was created for use in the Library of Congress. The new system replaced an established system of Thomas Jefferson.
When Herbert Putnam retired in 1939, all subgroups were excluded K ( right ) and parts of B ( Philosophy and Religion ) substantially elaborated. It has been criticized that the LCC, a theoretical basis is lacking; many of the basics of the system would be tailored to the needs of the Library of Congress.
The classification system of the National Library of Medicine (NLM ) uses the free letter W and partially Q. Some libraries use the system of NLM in conjunction with LCC ( without the letter R).
Structure of the LCC
The letters I, O, W, and Y are not assigned.