Classification
300 - Social sciences
576 - Genetics & evolution
600 - Technology
620 - Engineering & allied operations
3
700 - The arts; fine & decorative arts
720 - Architecture
3
900 - History & geography
140 - Specific philosophical schools
2
170 - Ethics
2
333 - Economics of land & energy
2
340 - Law
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
580 - Plants (Botany)
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
330 - Economics
1
370 - Education
1
500 - Natural sciences & mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
658 - General management
1