Edinburgh Napier University

The Dewey Decimal Classification System

Photo by Susan Q Yin on Unsplash


This Organisational system was conceived by Melvil Dewey in 1873 and first published in 1876. It is one of the most widely used in the world.


The DDC as it is shortened to, is used to organise books by subject. Each item is given a shelf mark identifier so it can be located easily. The main subject areas are:

000        Computer science, information, and general work

100        Philosophy and psychology

200        Religion

300        Social sciences

400        Language

500        Science

600        Technology

700        Art and recreation

800        Literature

900        History and geography

The first 3 digits are the main subject area.  The numbers after the point give a subsection. After the numbers there are 3 letters to represent the author or editor. For example 941.34  DAI This refers to a book on Edinburgh by David Daiches.  Books with the same DDC number are shelved first by their number, then in alphabetic order by author or Editor.

If you want a very fun (and most definitely silly) video on how to find a book, this YouTube video is perfect:


  1. web hosting or

    Hey excellent blog! Does running a blog such as
    this take a great deal of work? I have no knowledge of coding however I was hoping to start
    my own blog soon. Anyways, if you have any suggestions or techniques for
    new blog owners please share. I understand
    this is off subject but I simply needed to ask. Thank you!

    • julietkinsey

      Hi there. It’s really easy to get started. We use a free WordPress blog and you don’t need to know any coding at all. Watch a few “how to get started” videos or read some guides to get you off the ground. It might look a little intimidating the first time, but once you have made your first post it gets much easier. Good luck with your writing.

  2. bitly.com

    Hey! Do you know if they make any plugins to
    safeguard against hackers? I’m kinda paranoid about losing everything
    I’ve worked hard on. Any tips?

    • julietkinsey

      I’m not sure what plugins would be able to help. You should have a look on the wordpress help pages.

  3. an asmr

    Appreciate the recommendation. Will try it out.

  4. bit.ly

    I do accept as true with all of the concepts you have presented in your post.
    They are very convincing and can definitely work.

    Still, the posts are too brief for starters. May
    just you please prolong them a bit from subsequent time?
    Thanks for the post.

    • julietkinsey

      Thank you for your feedback. We may in the future write longer pieces for the blog.

Leave a Reply

Your email address will not be published. Required fields are marked *

© 2024 The Library Blog

Theme by Anders NorénUp ↑