| Subclass H | Social sciences (general) |
| Subclass HA | Statistics |
| Subclass HB | Economic theory. Demography |
| Subclass HC | Economic history and conditions |
| Subclass HD | Industries. Land use. Labor |
| Subclass HE | Transportation and communications |
| Subclass HF | Commerce |
| Subclass HG | Finance |
| Subclass HJ | Public finance |
| Subclass HM | Sociology (General) |
| Subclass HN | Social history and conditions. Social problems. Social reform |
| Subclass HQ | The family. Marriage. Women |
| Subclass HS | Societies: secret, benevolent, etc. |
| Subclass HT | Communities. Classes. Races. |
| Subclass HV | Social pathology. Social and public welfare. Criminology |
| Subclass HX | Socialism. Communism. Anarchism |
https://www.loc.gov/aba/cataloging/classification/lcco/lcco_h.pdf