Classification
414 - Phonology & phonetics
600 - Technology
620 - Engineering & allied operations
92
900 - History & geography
63
700 - The arts; fine & decorative arts
60
333 - Economics of land & energy
32
363 - Other social problems & services
30
580 - Plants (Botany)
22
630 - Agriculture & related technologies
18
000 - Computer science, information & general works
17
610 - Medicine & health
15
576 - Genetics & evolution
14
330 - Economics
11
380 - Commerce, communications & transportation
11
340 - Law
7
540 - Chemistry & allied sciences
7
551 - Geology, hydrology & meteorology
7
500 - Natural sciences & mathematics
6
304 - Factors affecting social behavior
5
140 - Specific philosophical schools
4
720 - Architecture
3
800 - Literature & rhetoric
3
320 - Political science
2
400 - Language
2
530 - Physics
2
550 - Earth sciences
1
581 - Specific topics in natural history
1
612 - Human physiology
1
658 - General management
1