Dewey Decimal System Day

Today is Dewey Decimal System Day, which honours the creation and establishment of the Dewey Decimal Classification System and American librarian Melvil Dewey (1851-1931) who invented it in 1876. The Dewey Decimal Classification system is a numerical sequencing system which organises primarily non-fiction books and publications into ten main categories to increase findability. It is the most vastly and frequently used library classification system across all libraries, including our very own campus libraries at Edinburgh Napier University.

A bit of History of  the Dewey Decimal System

The Dewey Decimal Classification System has been utilised widely since 1876 and over 200,000 libraries globally in 135 countries have adopted this library classification system to organise their non-fiction stock and publications. Whilst working at the Amherst College Library when he was 21, Melvil Dewey designed the proprietary classification system which was then eventually published in the year 1876. With the 10th of December 1851 having been Melvil Dewey’s date of birth, this calendar date was adopted as Dewey Decimal System Day to annually honour his creation of this widely used system. Its 20th edition was published in the late 20th century after several other editions having been released prior to this.

Dewey Groups

The Dewey Decimal Classification System categorises different genres of mostly non-fiction publications into one of ten classes and works as both a navigation and shorthand identification tool. These classes consist of specific topics and subject areas such as psychology, history or the arts to give a few examples. They are organised and shelved in alphanumerical order depending on which class the resource falls into from numbers 000-900. Each Dewey Decimal Classification (DDC) number will also have the first three letters of the author or organisation’s surname noted at the very end of it. You can find the call number classification and their classes listed below.

000-099: Computer Science, Information and General Works

100-199: Psychology and Philosophy

200-299: Religion

300-399: Social Sciences

400-499: Language

500-599: Science

600-699: Technology

700-799: Arts and Recreation

800-899: Literature

900-999: Geography and History

These classes are usually divided into subclasses as well. For example, the numerical category 300 covers social sciences, but since a significant number of topics exist within this individual subject area, numerical subcategories can be used to divide and distinguish them all. To illustrate, 320 call numbers cover political science, 340 call numbers cover law and 360 call numbers cover social problems and social services. These categories can be subdivided even further into existing topics within these topics – for example, 327 call numbers cover international relations, 346 call numbers cover private law, and 364 call numbers cover criminology.

All of the books within our campus libraries are organised and shelved in accordance with the Dewey Decimal Classification system. If you sign into LibrarySearch and search for any book within our collection you will find it’s Dewey Decimal Classification number here:

Acknowledgements…

The Dewey Decimal System significantly revolutionised library science. Findability is at the core of this system’s primary objectives. It was invented with the purpose of being easy to use, simplified and an effective navigation tool for patrons to easily locate and identify specific categories of books and publications for their research or other purposes. The system is also kept up-to-date and progressive through consistent revisions and expansions year to year and is maintained by libraries today using current technologies and library management systems.

How we can assist with navigating the DDC system…

Some patrons may feel overwhelmed when they first come across the Dewey Decimal Classification system and when using it to find the resources they require. Our library staff are here to assist you with this – you are always more than welcome to ask any of us at our library helpdesks for help with finding a specific book, or books within a specific numerical sequence and genre. Additional information about how to navigate our campus libraries can be found here in the My Napier Library webpage.

Recommended Reading…

• Summaries DDC 21: Dewey Decimal Classification Edition 21 : Numbers you can count on – Edinburgh Napier University.

By Rachel Downie

We have a previous blog post on finding books on LibrarySearch