Classification
620 - Engineering & allied operations
610 - Medicine & health
24
600 - Technology
13
370 - Education
10
580 - Plants (Botany)
6
500 - Natural sciences & mathematics
5
170 - Ethics
4
330 - Economics
4
340 - Law
4
380 - Commerce, communications & transportation
3
660 - Chemical engineering
3
700 - The arts; fine & decorative arts
3
363 - Other social problems & services
2
540 - Chemistry & allied sciences
2
576 - Genetics & evolution
2
630 - Agriculture & related technologies
2
900 - History & geography
2
100 - Philosophy & psychology
1
331 - Labor economics
1
361 - Social problems & social welfare in general
1
570 - Life sciences; biology
1