S - Agriculture (General)
SB - Plant culture
SD - Forestry
SF - Animal culture
SH - Aquaculture. Fisheries. Angling
SK - Hunting sports
For more detailed information, visit the Library of Congress Classification Outline.
S - Agriculture (General)
SB - Plant culture
SD - Forestry
SF - Animal culture
SH - Aquaculture. Fisheries. Angling
SK - Hunting sports