Classification
610 - Medicine & health
32
600 - Technology
8
330 - Economics
6
363 - Other social problems & services
5
380 - Commerce, communications & transportation
4
540 - Chemistry & allied sciences
3
700 - The arts; fine & decorative arts
3
340 - Law
2
576 - Genetics & evolution
2
100 - Philosophy & psychology
1
170 - Ethics
1
338 - Production
1
394 - General customs
1
500 - Natural sciences & mathematics
1
616 - Diseases
1
630 - Agriculture & related technologies
1
900 - History & geography
1