H - Social sciences (General)
HA - Statistics
HB - Economic theory. Demography
HC - Economic history and conditions
HD - Industries. Land use. Labor
HE - Transportation and communications
HF - Commerce
HG - Finance
HJ - Public finance
HM - Sociology (General)
HN - Social history and conditions. Social problems. Social reform
HQ - The family. Marriage. Women
HS - Societies: secret, benevolent, etc.
HT - Communities. Classes. Races
HV - Social pathology. Social and public welfare. Criminology
HX - Socialism. Communism. Anarchism
For more detailed information, visit the Library of Congress Classification Outline.
H - Social sciences (General)
HA - Statistics
HB - Economic theory. Demography
HC - Economic history and conditions
HD - Industries. Land use. Labor
HE - Transportation and communications
HF - Commerce
HG - Finance
HJ - Public finance
HM - Sociology (General)
HN - Social history and conditions. Social problems. Social reform
HQ - The family. Marriage. Women
HS - Societies: secret, benevolent, etc.
HT - Communities. Classes. Races
HV - Social pathology. Social and public welfare. Criminology
HX - Socialism. Communism. Anarchism