Classification
551 - Geology, hydrology & meteorology
000 - Computer science, information & general works
64
363 - Other social problems & services
45
700 - The arts; fine & decorative arts
36
580 - Plants (Botany)
34
333 - Economics of land & energy
31
330 - Economics
22
600 - Technology
21
620 - Engineering & allied operations
21
610 - Medicine & health
18
140 - Specific philosophical schools
17
380 - Commerce, communications & transportation
17
630 - Agriculture & related technologies
17
320 - Political science
16
900 - History & geography
13
581 - Specific topics in natural history
12
414 - Phonology & phonetics
11
540 - Chemistry & allied sciences
8
576 - Genetics & evolution
8
500 - Natural sciences & mathematics
7
658 - General management
7
304 - Factors affecting social behavior
6
550 - Earth sciences
6
612 - Human physiology
5
720 - Architecture
5
340 - Law
4
300 - Social sciences
3
370 - Education
3
530 - Physics
3
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
301 - Sociology & anthropology
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
400 - Language
1
615 - Pharmacology & therapeutics
1
657 - Accounting
1