Skip to main content
It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.

LSC-Tomball Community Library research guides banner

Call Numbers: LC and DD Classification Systems: Library Classification Systems

Introduction to Library of Congress and Dewey Decimal classification systems

Library - Opening Status & Service Information

In-person service - by Appointment only: 
If you need research help or are looking to make copies of a few pages from a text book from our Reserve collection, please contact us via:
Email: tcref@lonestar.edu
Text: 281.826.4488
Phone: 832.559.4211
From 9:00 a.m. - 4:00 p.m. to set up a time. 

Returning library materials

Return books and pick-up your hold items at our drive-through window.  Call 832.559.4200 for details. 

Monday - Thursday 10:00 am - 5:00 pm
Friday 10:00 am - 4:00 pm
Saturday - Sunday CLOSED

  • When you receive notification that your holds are ready for pick-up, call us at 832.559.4200 for instructions
  • Once you arrive on campus, please have your library card bar code number and PIN handy.
  • You will be given a pick-up time and instructions for pick-up
  • When you arrive at the library, follow the instructions you were provided over the phone.
  • You may be asked to show your library card or other form of ID for verification

Ask a Librarian!

Though the library is physically closed, Research Databases containing Articles, eBooks and Videos are available to our students, faculty and staff 24/7.

To access the databases, enter your 14-digit library barcode number located on the back of your college ID/ library card when prompted.  No college ID or library card? Use your myLoneStar username and password by clicking the link below the barcode login when prompted before entering a database.

Have a question? Ask us!

     Chat with a Librarian

 

               Email us: tcref@lonestar.edu

                     SMS / Text us: 281.826.4488

    

   
 

Introduction

This guide will introduce you to two main classification systems that most libraries in the US use to organize their library collection. They are called Library of Congress classification system, and Dewey Decimal classification system.

The Library of Congress Classification System (LCCS) was developed in the late 19th and early 20th century to organize the book collections of the Library of Congress (LC). Over time, the LC system has been adopted by many libraries, especially big Academic Libraries around the world. The LCCS divides all knowledge into 21 basic classes identified by a single letter of the alphabets.

The Dewey Decimal Classification (DDC) system was developed by Melvil Dewey in 1876. The DDC divided all knowledge into 10 basic classes identified by numbers. Below is a list that maps the LC headings to DDC.

Mapping of LC headings to DDC

                                         LCCS                                                              DDC

 

A General Works 000 Generalities
B Philosophy, Psychology, Religion  100 and
200		 Philosophy, Religion &   Psychology
C History of Ancient World, History
of Civilization		 930 and
974-998		 History of Ancient World (to circa 499 AD), General History 
D World History and History of Europe, Asia, Africa, Australia, New Zealand  909  World History 
E History of the Americas  970-979  History of North America 
F History of the Americas 980-989  History of South America 
G Geography, Anthropology, Recreation 900 Geography and History
H Social Sciences 300 Social Sciences 
J Political Science 379  Government Regulation, Control, Support 
K Law  340-349  Law 
L Education 370-378  Education
M Music and Books on Music  780-788  Music
N Fine Arts  700 The Arts
P Language and Literature  400 and 800 Language and Literature & Rhetoric
Q Science 500 Natural Sciences & Mathematics 
R  Medicine  610-619 Technology (Applied Sciences) 
S Agriculture  630-639  Agriculture 
T Technology 620-629 Engineering 
U Military Science 355  Military Science 
V Naval Science 359  Sea (Naval) Forces and Warfare 
Z Bibliography, Library Science, Information Resources (General) 020-028 

Library & Information Sciences 

Sources: "Library of Congress Classification Outline". The Library of Congress. n.d. Web. 3 Jul. 2012. (http://www.loc.gov/catdir/cpso/lcco/)

Sources: "Library of Congress Classification Outline". The Library of Congress. n.d. Web. 3 Jul. 2012. (http://www.loc.gov/catdir/cpso/lcco/)
"Dewey Decimal System: A Guide to Call Numbers". University Library, University of Illinois at Urbana Champaign. 6 Jun. 2011. Web. 3 Jul. 2012. (http://www.library.illinois.edu/ugl/about/dewey.html).