- NATURE: The history of ideas about the external order of nature studies by the physical and biological sciences, ideas also present in common usage, imaginative literature, myths about nature, metaphysical speculation.
- HUMANITY: The history of ideas about human nature in anthropology, psychology, religion, and philosophy as well as in literature and common sense.
- ART: The history of ideas in literature and the arts in aesthetic theory and literary criticism.
- HISTORY: The history of ideas about or attitudes to history, historiography, and historical criticism.
- POLITICS: The historical development of economic, legal, and political ideas and institutions, ideologies and movements.
- RELIG. & PHIL: The history of religious and philosophical ideas.
- MATH & LOGIC: The history of formal mathematical, logical, linguistic and methodological ideas.
As you can see there is a vast range of information on all sorts of ideas. Well worth a look.