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Library of Congress
Classification System
The Library of Congress
World’s largest library
Built from Thomas Jefferson’s personal library
(1815)
Also home to U.S. Copyright Office
Library of Congress
Classification System
Allows for a logical organization of materials grouped by
subject
Similar to the scientific classification for animals or plants.
Or the way groceries
are arranged in a store.
College/ University libraries
organize their resources differently
Dewey Decimal System
K –12 & public libraries
Library of Congress (LC)
• College/ University
libraries
WHY LC?
98% of academic libraries in the United States use the Library of
Congress (LC) classification scheme; it’s the “national standard”.
Because of the way it is structured, it more easily accommodates
scientific and scholarly titles and more nimbly allows for the
inclusion of new subjects.
LC makes finer distinctions among disciplines and subjects than
Dewey, making it more likely that books on the same or similar
topics will be found near each other. This will make it easier for
you to find books on your topics.
Dewey Decimal System
 000-099 General Knowledge
 100-199 Psychology & Philosophy
 200-299 Religions & Mythology
 300-399 Social Sciences & Folklore
 400-499 Languages & Grammar
 500-599 Math & Science
 600-699 Medicine & Technology
 700-799 Arts & Entertainment
 800-899 Literature
 900-999 History & Geography
Library of Congress Classification
Alpha-Numeric System
Major Subject Headings are Alphabetical
1st
Line of the call number represents
one of the subject divisions of the system
Basic Library of Congress Scheme
Dewey vs. LC
Dewey Decimal
System
300s –social sciences
Call number:
363
.70525
FR
Library of Congress
System
• GE –environmental
sciences
Call number:
GE
197
.F75
2008
Reading the LC Call Number
Reading the LC Call Number
Reading the LC Call Number
How to Find a Call Number
Read left to right, top to bottom
How to Find a Call Number
Read left to right, top to bottom
K
58
M35X
1999
KF
49
C65
1998
KF
14
D55
X
KF
14.15
C35X
A2
KFK
1230
D12
2001
KFK
1230
D8
1994
49 may come before
58 BUT K comes
before KF
C may come
before D BUT 14
comes before
14.15
1994 may come
before 2001
BUT .12 comes
before .80
F26
M36
P14
2004
Which one comes first?
F264
L14
S22
2001
Example 1 Example 2
ML
3534
.P37
1987
ML
3534
.F6
1986
Which one comes first?
Example 1 Example 2
Which one comes first?
TG
25
N53
S5
1983
TG
25
N53
M32
1982
Example 1 Example 2
Which one comes first?
PS
3511.19
Z86.34
PS
3511.19
Z86.112
Example 1 Example 2
Location Designations
Location Designations
How are books in college and
university libraries organized?
BY SUBJECT, USING THE
LIBRARY OF CONGRESS
CLASSIFICATION SYSTEM
Key point:

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Categorization: Library of Congress Classification System

  • 2. The Library of Congress World’s largest library Built from Thomas Jefferson’s personal library (1815) Also home to U.S. Copyright Office Library of Congress
  • 3. Classification System Allows for a logical organization of materials grouped by subject Similar to the scientific classification for animals or plants. Or the way groceries are arranged in a store.
  • 4. College/ University libraries organize their resources differently Dewey Decimal System K –12 & public libraries Library of Congress (LC) • College/ University libraries
  • 5. WHY LC? 98% of academic libraries in the United States use the Library of Congress (LC) classification scheme; it’s the “national standard”. Because of the way it is structured, it more easily accommodates scientific and scholarly titles and more nimbly allows for the inclusion of new subjects. LC makes finer distinctions among disciplines and subjects than Dewey, making it more likely that books on the same or similar topics will be found near each other. This will make it easier for you to find books on your topics.
  • 6. Dewey Decimal System  000-099 General Knowledge  100-199 Psychology & Philosophy  200-299 Religions & Mythology  300-399 Social Sciences & Folklore  400-499 Languages & Grammar  500-599 Math & Science  600-699 Medicine & Technology  700-799 Arts & Entertainment  800-899 Literature  900-999 History & Geography
  • 7. Library of Congress Classification Alpha-Numeric System Major Subject Headings are Alphabetical 1st Line of the call number represents one of the subject divisions of the system
  • 8. Basic Library of Congress Scheme
  • 9. Dewey vs. LC Dewey Decimal System 300s –social sciences Call number: 363 .70525 FR Library of Congress System • GE –environmental sciences Call number: GE 197 .F75 2008
  • 10. Reading the LC Call Number
  • 11. Reading the LC Call Number
  • 12. Reading the LC Call Number
  • 13. How to Find a Call Number Read left to right, top to bottom
  • 14. How to Find a Call Number Read left to right, top to bottom K 58 M35X 1999 KF 49 C65 1998 KF 14 D55 X KF 14.15 C35X A2 KFK 1230 D12 2001 KFK 1230 D8 1994 49 may come before 58 BUT K comes before KF C may come before D BUT 14 comes before 14.15 1994 may come before 2001 BUT .12 comes before .80
  • 15. F26 M36 P14 2004 Which one comes first? F264 L14 S22 2001 Example 1 Example 2
  • 17. Which one comes first? TG 25 N53 S5 1983 TG 25 N53 M32 1982 Example 1 Example 2
  • 18. Which one comes first? PS 3511.19 Z86.34 PS 3511.19 Z86.112 Example 1 Example 2
  • 19.
  • 22.
  • 23. How are books in college and university libraries organized? BY SUBJECT, USING THE LIBRARY OF CONGRESS CLASSIFICATION SYSTEM Key point:

Editor's Notes

  1. Although contemporary libraries increasingly provide access to collections electronically, physical collections still serve an integral function in the library. A great deal of authoritative, reliable, and relevant information is not yet available online. Thus, it is important to understand how a library’s physical collection is organized.