Interpreting Library of Congress (LC) Call Numbers
Library of Congress (LC) call numbers are read from left to right and from top to bottom.
Letters in the first line of the call number comprise part of the classification number. They are in alphabetical order.
Numbers in the second line of the call number comprise part of the classification number. They are in numerical order.
Letters and numbers in the third line of the call number comprise the Cutter number. Letters are in alphabetical order. Numbers are in decimal number order. A fourth line may have letters and numbers too. These will also be in alphabetical and decimal number order. It is important to remember that there is an "invisible" decimal point between the letter and the number.
One of the last lines of the call number may be a year. The year generally reflects the publication date.
The last line(s) of the call number may also have a volume number (i.e., v.1; t.2; Bd.3), a copy number (i.e., c.1; c.2; c.3), or both (i.e., v.1, c.1; t.1, c.2; Bd.3, c.3).