Classification
551 - Geology, hydrology & meteorology
620 - Engineering & allied operations
166
363 - Other social problems & services
159
600 - Technology
147
333 - Economics of land & energy
80
900 - History & geography
80
700 - The arts; fine & decorative arts
79
000 - Computer science, information & general works
57
630 - Agriculture & related technologies
48
330 - Economics
47
580 - Plants (Botany)
37
320 - Political science
36
380 - Commerce, communications & transportation
35
610 - Medicine & health
27
140 - Specific philosophical schools
22
581 - Specific topics in natural history
18
500 - Natural sciences & mathematics
17
414 - Phonology & phonetics
14
576 - Genetics & evolution
11
370 - Education
10
540 - Chemistry & allied sciences
10
720 - Architecture
9
300 - Social sciences
8
340 - Law
7
530 - Physics
5
658 - General management
5
800 - Literature & rhetoric
5
170 - Ethics
4
400 - Language
4
550 - Earth sciences
4
612 - Human physiology
4
304 - Factors affecting social behavior
3
100 - Philosophy & psychology
2
350 - Public administration & military science
2
360 - Social problems & services; associations
2
590 - Animals (Zoology)
2
361 - Social problems & social welfare in general
1
410 - Linguistics
1