How do I read a call number?
- Follow the letters alphabetically. For example, HD will be past the H's, the HA's, the HB's, and the HC's.
- Follow the numbers numerically. For example, HD4904 will be past the HD's with 2- and 3-digit numbers after it. Rather than going digit by digit, this is four thousand nine hundred four, so you'll have to go far past forty-nine and four hundred ninety to get to the four thousands.
- Any other letters and numbers, continue to follow alphabetically and numerically.
See our Understanding Call Numbers guide for more information: