The arts
  + subcategories
Biography & true stories
  + subcategories
Language
  + subcategories
Literature & literary studies
  + subcategories
English language teaching (ELT)
  + subcategories
Fiction & related items
  + subcategories
Reference, information & interdisciplinary subjects
  + subcategories
Humanities
  + subcategories
Society & social sciences
  + subcategories
Economics, finance, business & management
  + subcategories
Law
  + subcategories
Medicine
  + subcategories
Mathematics & science
  + subcategories
Earth sciences, geography, environment, planning
  + subcategories
Technology, engineering, agriculture
  + subcategories
Computing & information technology
  + subcategories
Health & personal development
  + subcategories
Lifestyle, sport & leisure
  + subcategories
Children's, Teenage & educational
  + subcategories

Categories by place:

World
  + subcategories
Europe
  + subcategories
Asia
  + subcategories
Africa
  + subcategories
The Americas
  + subcategories
Australasia, Oceania, Pacific Islands, Atlantic Islands
  + subcategories
Other geographical groupings: Oceans & seas, historical, political etc
  + subcategories
Space, planets & extraterrestrial locations
  + subcategories

Categories by languge:

Indo-European languages
  + subcategories
Indic, East Indo-European & Dravidian languages
  + subcategories
Afro-Asiatic languages
  + subcategories
Ural-Altaic & Hyperborean languages
  + subcategories
East & Southeast Asian languages
  + subcategories
African languages
  + subcategories
American indigenous languages
  + subcategories
Oceanic & Austronesian languages
  + subcategories
Other languages
  + subcategories

Categories by time period:

Prehistory
  + subcategories
BCE period Protohistory
  + subcategories
CE period up to c 1500
  + subcategories
c 1500 onwards to present day
  + subcategories

Categories by educational purpose:

For all educational levels
  + subcategories
For international curricula & examinations
  + subcategories
For language learning courses & examinations
  + subcategories
For specific educational purposes
  + subcategories
For specific national or regional educational curricula
  + subcategories

Categories by interest:

Interest age / level
  + subcategories
Holidays, events & seasonal interest
  + subcategories
Intended for specific groups
  + subcategories
Relating to the stages of life
  + subcategories
Relating to specific groups & cultures or social & cultural interests
  + subcategories
Contains explicit material
  + subcategories