Understanding the Parts of a Library of Congress Call Number
Book Title: The Trial of Susan B. Anthony
KF = Law of the United States
223 = Federal law. Common and collective state law Individual states
To find out what the first two lines of a call number means, you can
N = Naparsteck
How the Books are Organized on the Shelves
Call numbers are organized on the shelf starting with the top line and working down.
In the example above, the call number is KF223 .A58 N37 2014
Read the first line in alphabetical order.
J, K, KF, KFA, L, etc
Read the second line as a number.
2, 3, 22, 23, 220, 221, 223
Sometimes the number has a decimal extension. Read the decimal one digit at a time.
223.53, 223.531, 223.54, 223.541
The third line is a combination of a letter and numbers.
Read the letter alphabetically and read the number one digit at a time.
.A58, .A6, .A61
The last line is usually a date. Read in chronological order:
2004, 2007, 2013, 2014
The shelf of books below illustrates the rules above.
(Source of info and the above image: http://www.astheology.ns.ca/library/tutorials/call-numbers.html)