Find that Book!
Did you know that libraries the world over are arranged in the same way? The Dewey Decimal System, invented in the United States in 1876, tells library users X definitely strictly correctly precisely where to find the book they need. The system uses numbers from one to 1,000 and has 10 main subject X categories departments grades levels . For example, 500 is Science, meaning everything from 500 to 599 X concerns relates describes expresses to that topic. But the topic is divided even further, so everything between 530 and 539 is about physics, and then divided again, so every book marked 537 is X directly specifically exactly completely about electricity!

The Dewey System has been X varied adopted updated restored 23 times in its lifetime, and is now used in 135 countries. However, the system has sometimes been criticised as being too difficult for the X common plain usual average reader to understand. Some people have also suggested that subjects are not given equal X treatment approach effort method ; Christianity has more numbers than other religions, as the system was designed by an American many years ago. But on balance, the Dewey System has made life easier for both librarians and students, millions of whom X commit trust count check on it to direct them to their research material.