| B | 1-5739 | Philosophy (General) |
| 108-708 | Ancient | |
| 720-765 | Medieval | |
| 770-785 | Renaissance | |
| 790-5739 | Modern |
| BC | 1-199 | Logic |
| BD | 10-701 | Speculative Philosophy |
| 10-41 | General Philosophical Works | |
| 95-131 | Metaphysics | |
| 143-236 | Epistemology | |
| 240-260 | Methodology | |
| 300-450 | Ontology | |
| 493-701 | Cosmology |
| BH | 1-301 | Aesthetics |
| BJ | 1-2195 | Ethics. Social Usages. Etiquette. |
| 71-1185 | History and Systems (including individual ethical philosophers) | |
| 1188-1295 | Religious Ethics | |
| 1518-1697 | Individual Ethics, Character, Virtue | |
| 1725 | Ethics of Social Groups, Classes, Etc., Professional Ethics | |
| 1801-2195 | Social Usages, Etiquette |
