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Search for Books: Read Call Numbers

Call numbers are like a book's address

They tell you a bit about the book and where it can be found in the library. Each row of bookshelves has a sign with which call numbers are in that row.

Most of our books use Library of Congress Classification call numbers. The letters and numbers are assigned based on the book's subject, so you can find other books about similar topics on the shelf nearby.

Books with call number labels, listed in order

Call numbers in order on the shelf

1st Letters

Books are arranged in alphabetical order. A single letter comes before double letters.


1st Numbers

The numbers are in order, from low to high. Read the first set of numbers as whole numbers, followed by decimals.

F1 F23 F456 F456.7

2nd Letters

The 2nd set of letters comes after the decimal point. They are arranged in alphabetical order.


2nd Numbers

Immediately after the letter, there's another number. Read them as decimals.


3rd Letters & Numbers

If there are any more letters and numbers, read these the same way you did for the 2nd set.

Year of publication

The year it was published is last.

Library of Congress Classification

A General Works
B Philosophy, Psychology, Religion
C Archaeology, Genealogy, Biography
D History & Ancient History
E-F History of America
G Anthropology, Geography, Folklore
H Social Sciences, Statistics, Business
J Political Science
K Law
L Education
M Music
N Fine Arts
P Languages & Literature
Q Science
R Medicine
S Agriculture
T Technology
U Military Science
V Naval Science
Z Bibliography & Library Science