Dewey 23

An overview of the changes

Logging onto WebDewey 23

Dewey 23

Many small ‘tweaks’ to numbers, rather than major areas of change

Many of these small changes have already been incorporated into WebDewey 22

Take great care when using numbers taken from other records, especially if these are Dewey 22 rather than 23. Always check numbers, rather than assuming that a number is correct

Example of change already added to WebDewey 22 (but not in the print manuals)

Main kinds of change

Topic moved to a new number

Changes to the scope of a number

New “add tables”

Changes to both scope and number

New historical periods

Topic shifted to a new number

Change to the scope of a number

New Add Tables

“Add tables” are lists of special notation that can be added to a base number to make it more specific. Dewey 23 contains some new add tables

For example, there is a new add table at 155 Differential and developmental psychology

Top 20 Teens: Discovering the Best-Kept Thinking, Learning & Communicating Secrets of Successful

Teenagers.

Top 20 Teens …

Class at: 155.51/9 Applied psychology for young people twelve to twenty

The breakdown is:

155.51 General topics of psychology of young people twelve to twenty plus 9 Applied psychology from the add table at 155

In Dewey 22, you do not have the option of adding 9 for “Applied psychology” so your number would just have been 155.51

Number moved and scope updated

Numbers that just don’t exist any more 721[.046] Architecture and the

environment, multiple-purpose buildings

Both the subordinate topics “Architecture and the environment’ & “Multipurpose buildings” have been moved elsewhere – so there is now no purpose for 721.046 and it has been removed

New historical period numbers added

Some areas where there have been many small changes 320s - Politics 363-363 - Social problems and services 808s – Collections of literary texts from more

than 2 literatures Historical period numbers for Italy and

SouthEast Asia New historical period numbers added for many

countries

Summary

Many small differences Ability to create more precise numbers (in

some cases) Always check numbers, and read scope

notes carefully