Introduction to Classification

The chief purpose of a classification system within a library environment is to provide a standardized basis for the organization of books and other library materials.
This systematic organization ensures that items can be located quickly and easily by library patrons and staff.
Classification serves as a means of bringing materials with the same subject matter together on the shelves. This grouping allows for easy and convenient use of resources by the community.
There are two major classification systems widely recognized and implemented:
- Library of Congress Classification System (LCCS)
- Dewey Decimal Classification System (DDC)

The primary uses include:
- Grouping materials on the same subject together to facilitate research and discovery.
- Allowing for the efficient storage and retrieval of items within the physical library space.
- Demonstrating the main subject areas and strengths of a library's overall collection.
Classification systems utilize notation as a shorthand representation for technical subjects and concepts.

Notation is defined as the alphabets, numbers, and symbols used within a specific classification scheme.
There are two distinct types of notation:
- Pure Notation: This type utilizes only one kind of character. It consists strictly of numbers from $0$ to $9$ or alphabets from $A$ to $Z$ . For example, the Dewey Decimal Classification Scheme (DDC) is characterized by pure notation as it uses Arabic numerals.
- Mixed Notation: This type combines different kinds of characters. It can be alphanumeric (mixing letters and numbers) or incorporate additional symbols.
  - The Library of Congress Classification Scheme (LCCS) is an example of mixed notation because it combines alphabets and numbers.
  - The Universal Decimal Classification Scheme (UDC) uses a mix of numbers, alphabets, and specialized symbols such as $+$ , $=$ , $/$ , and $:$ .

Historical Context: The Library of Congress was founded in the year $1800$ . LCCS represents one of the earliest systematic classifications of books.
Application: The LC system is the standard used in most academic and university libraries.
Structural Mechanics:
- Books on similar subjects are grouped under primary classes.
- Knowledge is organized into $21$ broad categories (the transcript also notes a grouping of $20$ primary classes), which are represented by letters of the alphabet labeled $A$ through $Z$ .
- The notation is mixed, combining letters of the alphabet and Arabic numerals.
- Excluded Letters: The letters $I$ , $O$ , $W$ , $X$ , and $Y$ are not currently in use for main class designations.
- Call Number Construction: An LC number can begin with $1$ , $2$ , or $3$ letters. Most subject area call numbers begin with $1$ or $2$ letters.
- Subject Examples:
  - $Q$ = Science
  - $QE$ = Geology
  - $E$ = U.S. History
  - $KFH$ = Law of Hawaii
  - $PN\,6109.9$ = Collection of poetry by women authors
  - $TK\,7800$ = Electronics

A: GENERAL WORKS
B: PHILOSOPHY. PSYCHOLOGY. RELIGION
C: AUXILIARY SCIENCES OF HISTORY
D: WORLD HISTORY AND HISTORY OF EUROPE, ASIA, AFRICA, AUSTRALIA, NEW ZEALAND, ETC.
E: HISTORY OF THE AMERICAS
F: HISTORY OF THE AMERICAS
G: GEOGRAPHY. ANTHROPOLOGY. RECREATION
H: SOCIAL SCIENCES
J: POLITICAL SCIENCE
K: LAW
L: EDUCATION
M: MUSIC AND BOOKS ON MUSIC
N: FINE ARTS
P: LANGUAGE AND LITERATURE
Q: SCIENCE
R: MEDICINE
S: AGRICULTURE
T: TECHNOLOGY
U: MILITARY SCIENCE
V: NAVAL SCIENCE
Z: BIBLIOGRAPHY. LIBRARY SCIENCE. INFORMATION RESOURCES (GENERAL)

Mechanics: The system uses Arabic numerals decimally to signify various subject classes.
Knowledge Division: Melvil Dewey divided all knowledge into nine broad classes (numbered $100-900$ ), though generalities are categorized in the $000$ range, creating $10$ main classes.
Notation Type: DDC utilizes pure notation (numbers and decimals).
Application: DDC is most commonly found in school libraries and public libraries.
Examples:
- $621.38$ = Electronics and communication engineering
- $510$ = Mathematics

The arrangement of materials on the physical shelves follows the sequential outline of the specific classification system used.
LCCS Shelving: Books are arranged by the classification number and then alphabetically by the author's name/code.
DDC Shelving: The numbers are followed in decimal order. For example, a shelf order would look like this:
- $745.4\,,\,H8883n$
- $745.4441\,,\,F352d$
- $745.5\,,\,V882a$
- $745.54\,,\,N134b$
- $745.674\,,\,L152g$
- $745.7\,,\,B121f$
- $810\,,\,D191s$
- $810.9\,,\,Ar658a$
- $810.903\,,\,L1281t$
- $810.917\,,\,D193s$

Advantages

Consistency: Shelving is more consistent because each classmark acts as a specific "address" for the item.
Straightforward Retrieval: Users can search for clear labels on the book spine, which is more effective than trying to read potentially small or difficult author and title text.
Browsing: Makes browsing the stacks easier for users interested in a specific topic.

Disadvantages

Limited Scope: Not every single subject may be catered for or represented within the predetermined scheme.
User Confusion: Library patrons may be confused by what specific classmarks represent, as there is often no obvious or recognizable link between the code and the book subject to an untrained eye.
Risk of Misplacement: If a book is assigned the wrong classmark and shelved outside its designated subject area, it can effectively be lost forever to users.

Question 1: Sort the following Library of Congress (LCC) call numbers into correct shelf order:

Question 2: Sort the following Library of Congress (LCC) call numbers into correct shelf order: