Head of Reference
October 9, 2025
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Research libraries use the Library of Congress Classification call number system
Developed in 1897 for the Library of Congress collection
Each book gets a call number, functionally a book address
What the book is about determines what call number it gets, and subsequently where in the library it goes
Call numbers start with a letter
Each letter is a subject area
This is where what the book is most about comes into play
Organize the books we have according to call number, to the best of our abilities
Toni Morrison
Black Panthers
New York City
Sculpture
PS 3563 .O8749 B4 1987
PS 3563 .O8749 B438 1999
PS 3563 .O8749 P37 2014
PS 3563 .O8749 P377 1999
TR 681 .B52 S53 2022
E 185 .615 .S7247 2024
F 1435.3 .S34 O54 2024
NB 497 .H4 A4 1994
NB 1296.2 .R87 1989
F 128.65 .T5 I58 1991
F 128.9 .P85 F47 2020
F 128.9 .P85 L44 2014
F 130 .N4 P47 2011
HD 8039 .T162 U636 2007
HD 9999 .C9473 N49 2007
HV 9481 .N62 R555 2023
JC 599 .U52 C35 2011
LD 3818.8 .T72 1994
Start here to find the correct floor
Next, find the aisle that encompasses this number within the correct letter range
In the aisle, look at the call numbers on the books and match this row. Only one book will have this number within the broader range
Last line is the publication year
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