Here, you are required to assign a DDC (Dewey Decimal Classification) code to your document. Only DDC summaries, i.e., the top three levels are applicable here. Select a code from the third level.

Example:
DDC

• 000 Computer science, information & general works
  • 000 Computer science, knowledge & systems
    
    • 000 Computer science, information, general works

In order to find more subject categories, click on +.