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From Wikipedia

Library classification

A library classification is a system of coding and organizing library materials (books, serials, audiovisual materials, computer files, maps, manuscripts, realia) according to their subject and allocating a call number to that information resource. Similar to classification systems used in biology, bibliographic classification systems group entities together that are similar, typically arranged in a hierarchical tree structure. A different kind of classification system, called a faceted classification system, is also widely used which allows the assignment of multiple classifications to an object, enabling the classifications to be ordered in multiple ways.


Library classification forms part of the field of library and information science. It is a form of bibliographic classification (library classifications are used in library catalogs, while "bibliographic classification" also covers classification used in other kinds of bibliographic databases). It goes hand in hand with library (descriptive) cataloging under the rubric of cataloging and classification, sometimes grouped together as technical services. The library professional who engages in the process of cataloging and classifying library materials is called a cataloguer or catalog librarian. Library classification systems are one of the two tools used to facilitate subject access. The other consists of alphabetical indexing languages such as Thesauri and Subject Headings systems.

Library classification of a piece of work consists of two steps. Firstly the "aboutness" of the material is ascertained. Next, a call number (essentially a book's address), based on the classification system in use at the particular library will be assigned to the work using the notation of the system.

It is important to note that unlike subject heading or thesauri where multiple terms can be assigned to the same work, in library classification systems, each work can only be placed in one class. This is due to shelving purposes: A book can have only one physical place. However in classified catalogs one may have main entries as well as added entries. Most classification systems like the Dewey Decimal Classification (DDC) and Library of Congress classification also add a cutter number to each work which adds a code for the author of the work.

Classification systems in libraries generally play two roles. Firstly they facilitate subject access by allowing the user to find out what works or documents the library has on a certain subject. Secondly, they provide a known location for the information source to be located (e.g. where it is shelved).

Until the 19th century, most libraries had closed stacks, so the library classification only served to organize the subject catalog. In the 20th century, libraries opened their stacks to the public and started to shelve the library material itself according to some library classification to simplify subject browsing.

Some classification systems are more suitable for aiding subject access, rather than for shelf location. For example, UDC which uses a complicated notation including plus, colons are more difficult to use for the purpose of shelf arrangement but are more expressive compared to DDC in terms of showing relationships between subjects. Similarly faceted classification schemes are more difficult to use for shelf arrangement, unless the user has knowledge of the citation order.

Depending on the size of the library collection, some libraries might use classification systems solely for one purpose or the other. In extreme cases a public library with a small collection might just use a classification system for location of resources but might not use a complicated subject classification system. Instead all resources might just be put into a couple of wide classes (Travel, Crime, Magazines etc.). This is known as a "mark and park" classification method, more formally called reader interest classification.


There are many standard system of library classification in use, and many more have been proposed over the years. However in general, Classification systems can be divided into three types depending on how they are used.

In terms of functionality, classification systems are often described as

  • enumerative: produce an alphabetical list of subject headings, assign numbers to each heading in alphabetical order

library classification is the technical process

  • hierarchical: divides subjects hierarchically, from most general to most specific
  • faceted or analytico-synthetic: divides subjects into mutually exclusive orthogonal facets

There are few completely enumerative systems or faceted systems, most systems are a blend but favouring one type or the other. The most common classification systems, LCC and DDC, are essentially enumerative, though with som

From Yahoo Answers

Question:what is and easy way to remember the 7 levels of animal classification

Answers:I've always went by: King Phillip called out for great sex. Oddly enough, I learned that in Catholic school ... go figure? Kingdom Phylum Class Order Family Genus Species There are sub- and super- levels as well, which have muddled up the taxonomic system to a degree or two.

Question:so in biology, im doing a classifacation tree type thing and i need differences in these groups of animals: Group 1: Penguin Duck Platypus Group 2: Turtle Starfish Group 3: Dolphin Shark Group 4: Sponge Jellyfish Lobster Crayfish Group 5: Shrew Opossum PLEASE HELP ITS DUE 1st PERIOD TOMOROW THANKS =)

Answers:Group 1: where they live (arctic and not arctic) # of legs Group 2: # of legs Group 3: teeth? Group 4: shell or no shell Group 5: pouch and no pouch Good luck and i hope this helps =]

Question:1) What is the TAXONOMIC CLASSIFICATION of humans? 2)Why do leaves turn red, orange and yellow in the fall? 3) What are some of adaptations some animals have developed to help avoid predation?

Answers:1) Homo sapiens sapiens (H. s. sapiens, modern man is a subspecies of Homo sapiens, considered the prehistoric man) 2) Chlorophyll degrades quickly after the plant stops vital processes for winter (stops transporting water through its roots to avoid freezing to death). The remaining pigments in the plant (carotenoids and flavinoids) degrade more slowly and are around until they've degraded, causing the plants leaves to turn from green to yellow, orange, or red, to brown at the expiration of the leftover pigments. 3) Camoflage (stripes, spots, coloring that matches their environment), playing dead, "stink" secretion (like skunks or stink bugs), ability to appear larger (raising hair on a cat or dog, swelling of the throat skin on frogs), loud noises that confuse or scare predators, and poisons that are secreted from the skin, mouth, or in the blood.

Question:kingdom archae.. kingdom plantae..kingdom eubacteria, kingdom protista, kingdom fungi, and kingdom animalia.. i do understand all of those, but still quite confused on how each animal kingdom (cells .. maybe) is different from each other.. might've been physical features? number of cells? or any other.. i'd like to know everybody's answer.. who knows.. i might've use it in test.. i'd like to ask some.. help me out ok.. thanks!!

Answers:Ha ha. Kingdom Archeae are prokaryotes. This means they have no nucleus and no organelles, and are single celled organisms. Kingdom Eubacteria are Eukaryotes. These are cells like ours - With organelles and nucleii. Once again, they are single celled organisms. Kingdom Plantae. These are the plants - I'm pretty sure you know what they look like. Multicellular organisms. Kingdom Animalia. These are the animals. Again, it's fairly obvious what they look like. Multicellular organisms. Kingdom Fungi. These are funguses. They are the mushrooms, the molds, etc... Multicellular organisms. Kingdom Protists. This one's a little tougher - Protsists are usually single celled eukaryotes, however they can also be multicellular - But they won't form specialied tissues. They are often but not always photosynthetic. An example is plankton.

From Youtube

Learn Biology: Classification- The Taxonomic Hierarchy :www.mahalo.com Mary Poffenroth, an adjunct professor of biology, teaches you different topics of biology. In this video she explains the classification system of species and the taxonomic hierarchy. Biology Playlist: www.youtube.com Check out these related Mahalo pages: Classification- Domains: www.mahalo.com Classification- The Taxonomic Hierarchy: www.mahalo.com Ecosystem Definition & Biotic Factors vs. Abiotic Factors: www.mahalo.com Bioms & Communities Definition: www.mahalo.com Community Ecology- Interspecific Interactions: www.mahalo.com Trophic Levels & Producer vs. Consumer: www.mahalo.com Charles Darwin Biography: www.mahalo.com Natural Selection: www.mahalo.com Blood Cells of the Human Body: www.mahalo.com Good Bacteria vs. Bad Bacteria: www.mahalo.com Angiosperms & Pollinators: www.mahalo.com Check out more video from Mahalo: How to Speak German: www.youtube.com How to Speak French: www.youtube.com How to Speak Spanish: www.youtube.com How to Speak Korean: www.youtube.com Christmas Arts & Crafts: www.youtube.com How to Have a Healthy Relationship: www.youtube.com Parenting: www.youtube.com Celebs in 60: www.youtube.com Canon DSLR: www.youtube.com LA's Hottest Bartender: www.youtube.com All images licensed under Creative Commons: Moon Stars and Paper- moonstarsandpaper.blogspot.com

Classifications of Animals :Check us out at www.tutorvista.com Animals are classified in a variety of ways. This helps scientists to study the relationships in animal groups and to see the whole animal family tree as it has developed through time. The study of animal classification is called taxonomy. The basic unit of an animal is the cell. A cell is the smallest unit of any animal or plant. Some animals are one celled, some consist of millions of cells. Each cell is filled with a living matter called protoplasm. It also has a nucleus that is the center of the cell and directs its activities. The cytoplasm is the area outside of the nucleus. Each cell is held together by a cell membrane which is like a very thin skin for the cell. Many cells have different jobs to do in an animal, whether they be bone, blood, skin cells. A group of the same kinds of cells are called tissues. A group of tissues that work together to do a job in the animal's body is an organ. The stomach, heart, kidneys, lungs are examples of organs. A group of organs that do a number of jobs of the same kind are systems. Animals are grouped together or classified in a variety of ways. Some of them are: Whether an animals in one celled or many celled. How an animal's bodily systems differ. Animal groupings are similar to plants. The groupings are: * Kingdom - There are two basic kingdoms, the plant and animal kingdoms. There is a third with animals that bridge the plant and animal kingdom. * Phylum - Within the plant and animal ...