Classification
576 - Genetics & evolution
900 - History & geography
16
320 - Political science
12
330 - Economics
8
333 - Economics of land & energy
7
340 - Law
6
700 - The arts; fine & decorative arts
6
600 - Technology
5
620 - Engineering & allied operations
5
200 - Religion
4
363 - Other social problems & services
4
140 - Specific philosophical schools
3
170 - Ethics
3
300 - Social sciences
3
304 - Factors affecting social behavior
3
580 - Plants (Botany)
3
610 - Medicine & health
3
630 - Agriculture & related technologies
3
800 - Literature & rhetoric
3
000 - Computer science, information & general works
2
100 - Philosophy & psychology
2
380 - Commerce, communications & transportation
2
540 - Chemistry & allied sciences
2
720 - Architecture
2
270 - History of Christianity & Christian church
1
296 - Judaism
1
297 - Islam, Babism & Bahai Faith
1
370 - Education
1
400 - Language
1
530 - Physics
1
780 - Music
1