Policy & misc. info.
050 4 guidelines
Duplicate call nos.
Library of Congress
GA and GAX old
Richardson classification system
The Richardson classification system, which is unique to Princeton,
was devised by Ernest Cushing Richardson, a University Librarian
from 1890 to 1920.
At that time the Dewey classification system was felt to be
inappropriate for a research collection, and the Library of Congress
system was not yet fully developed.
Only three types of material are still added in Richardson:
- Certain types of books cataloged by Near East Technical Services.
- Added volumes to serial and bookset records that were originally
classed in Richardson, as well as titles in monographic series classed
as a set (CAS) in a Richardson number.
- If a new book is an added copy for the same location (ACX) or a
replacement of a title with a Richardson number, give the new book
the same Richardson number. If it is an added copy for a different
location (AC) of a title with a Richardson number, give it an LC number.
Richardson numbers consist of a class number (which may include decimal
numbers) and a book number. The entire call number is filed decimally.
- There are no letters or letter combinations in the class number
- Each class number has a minimum of 4 and a maximum of 6 digits.
The first digit may be a 0.
- The book number usually has no letter component.
- The book number follows the class number and is preceded by a decimal.
Prior to July 1994, when Princeton stopped filing shelflist cards,
Richardson numbers were formulated on RLIN with a backslash preceding
each element (e.g., \3332\.25\.18).
The complete schedule to the Richardson classification system is located
in the (DC) section in Catalog Division. In addition, there is an Outline
of Richardson Classification at (DC) Z696.xR55; an Index
to the Richardson Classification at (DC) Z696.xR551; and,
Princeton University Library Classification System, 1900-1920