Classification
580 - Plants (Botany)
000 - Computer science, information & general works
84
610 - Medicine & health
80
333 - Economics of land & energy
77
700 - The arts; fine & decorative arts
71
600 - Technology
63
363 - Other social problems & services
53
630 - Agriculture & related technologies
52
620 - Engineering & allied operations
49
330 - Economics
34
380 - Commerce, communications & transportation
29
551 - Geology, hydrology & meteorology
24
581 - Specific topics in natural history
24
900 - History & geography
23
540 - Chemistry & allied sciences
18
140 - Specific philosophical schools
15
414 - Phonology & phonetics
13
612 - Human physiology
12
576 - Genetics & evolution
11
658 - General management
10
800 - Literature & rhetoric
8
320 - Political science
6
720 - Architecture
6
500 - Natural sciences & mathematics
5
100 - Philosophy & psychology
4
340 - Law
4
361 - Social problems & social welfare in general
4
530 - Physics
4
615 - Pharmacology & therapeutics
4
304 - Factors affecting social behavior
3
370 - Education
3
590 - Animals (Zoology)
3
400 - Language
2
170 - Ethics
1
300 - Social sciences
1
301 - Sociology & anthropology
1
336 - Public finance
1
520 - Astronomy & allied sciences
1
650 - Management & auxiliary services
1
657 - Accounting
1