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(ECC) Library of Congress Classification: One, Two, Three!

Help to compare Dewey Decimal System and Library of Congress Classification systems

Classifications

Feeling overwhelmed? Don't worry! It really is as easy as One, Two, Three! One signifies the Subject, Two signifies the Cutter, and Three helps with the Extra Stuff! Each line gets more specific.

The Subject covers broad concepts: music, history, science. They also denote subtopics: jazz, WWII, physics, respectively. This will help you find the topic you're looking for. 

The Cutter gives information specific to a book: author, title, language, etc. This will help you find the book you're looking for.

The Extra Stuff covers information like year published and the copy or volume number. This will help you find a specific book as sometimes we have multiple editions, copies, or volumes that can be found under the same call number.

Dissecting the Call Number

Let's use "The Oxford Companion to Jazz" as an example. Its call number is "ML3507 .O94 2000", as seen in the image on the right. 

Cutter: What is it? What does it mean?
ML General subject M- music; ML- literature of music
3507 Specific subject ML3469-3541- Popular music
.O94 1st cutter, author Based on the author's name; "Oxford"
2000 Year Usually the year the book was published

You may notice that while Oxford itself is not the author, they are credited as one. When a book is written in collaboration with multiple authors, you may see the editor (Bill Kirchner in this case) or the publisher (Oxford University Press.) With this book, the publisher was credited.

 

Dissecting the Call Number

Another example, This Blessed Earth, has a more complex cutter. Most cutters will only have four lines but this one has six. One of the extra lines indicates multiple copies, this one being the fifth of its kind. (This is also where you would find the volume number of a series, denoted by a "v.")

Cutter: What is it? What does it mean?
HD General subject H- social sciences, HD- Industries. Land Use. Labor.
1476 Specific subject HD1470-1476- Size of farms
.U62 1st cutter, subtitle Subtitle signifies the "Updated" version
N25 2nd cutter, location Takes place in Nebraska
c.5 Identifies copy number This is ECC Library's fifth copy
2017 Publishing year Published 2017

As you can see on the first and second cutter, they do not always use the author's name. These lines are used to point to an even more specific area than the subject did. Sometimes it will be the author or artist, title or subtitle,and even geographical location or language.

Dissecting the Call Number

Cutter: What is it? What does it mean?
RESERVE Reserve Reserved for library use only
GV General subject G- Geography. Anthropology. Recreation., GV- Recreation, Leisure
1196 Specific subject GV1195-1198.995 Wrestling
.C76 1st cutter, title Title begins with C, "Carry"
F46 2nd cutter, author Author's last name begins with F, "Fenn"
2016 Year Published in 2016
c.1 Identifies copy number This is ECC's first copy