Classification
363 - Other social problems & services
600 - Technology
26
620 - Engineering & allied operations
23
700 - The arts; fine & decorative arts
22
333 - Economics of land & energy
18
900 - History & geography
16
000 - Computer science, information & general works
12
330 - Economics
11
580 - Plants (Botany)
10
576 - Genetics & evolution
9
380 - Commerce, communications & transportation
8
414 - Phonology & phonetics
7
140 - Specific philosophical schools
5
320 - Political science
4
610 - Medicine & health
4
720 - Architecture
4
340 - Law
3
500 - Natural sciences & mathematics
3
551 - Geology, hydrology & meteorology
3
630 - Agriculture & related technologies
3
304 - Factors affecting social behavior
2
530 - Physics
2
540 - Chemistry & allied sciences
2
658 - General management
2
370 - Education
1
581 - Specific topics in natural history
1