Classification
333 - Economics of land & energy
610 - Medicine & health
700 - The arts; fine & decorative arts
800 - Literature & rhetoric
900 - History & geography
600 - Technology
7
620 - Engineering & allied operations
5
330 - Economics
4
363 - Other social problems & services
4
380 - Commerce, communications & transportation
4
370 - Education
3
576 - Genetics & evolution
3
580 - Plants (Botany)
3
720 - Architecture
3
100 - Philosophy & psychology
2
140 - Specific philosophical schools
2
170 - Ethics
2
300 - Social sciences
2
340 - Law
2
630 - Agriculture & related technologies
2
658 - General management
2
120 - Epistemology, causation & humankind
1
400 - Language
1
414 - Phonology & phonetics
1
520 - Astronomy & allied sciences
1