Classification
320 - Political science
333 - Economics of land & energy
363 - Other social problems & services
370 - Education
600 - Technology
700 - The arts; fine & decorative arts
330 - Economics
6
380 - Commerce, communications & transportation
5
900 - History & geography
5
000 - Computer science, information & general works
4
551 - Geology, hydrology & meteorology
4
610 - Medicine & health
4
620 - Engineering & allied operations
4
720 - Architecture
4
140 - Specific philosophical schools
1
300 - Social sciences
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
658 - General management
1