Read the following articles, paying particular attention to:
Here is a good, basic formula for getting started with your research:
There are two major call number systems used in the libraries: the Dewey Decimal and Library of Congress classification schemes. The first line of a call number, as it appears on a physical item, is a broad subject classification. The subsequent lines are combinations of letters and numbers that organize items into narrower, related categories.
Library of Congress | Dewey Decimal |
HB Alphabetically 615 Whole number |
573.3 Whole number, followed by decimal |
C518 Alphabetically, then decimals (may be followed by another letter) |
.W932A Alphabetically, then decimals |
2018 Publication Date, shelves chronologically | e.g., 573.3 W932A shelves before 573.3 W94A |
See How to Read Call Numbers from the University of Berkeley Library for more details about LC call numbers.