Classification
580 - Plants (Botany)
333 - Economics of land & energy
42
700 - The arts; fine & decorative arts
42
000 - Computer science, information & general works
34
600 - Technology
33
363 - Other social problems & services
30
330 - Economics
26
610 - Medicine & health
25
620 - Engineering & allied operations
24
900 - History & geography
18
380 - Commerce, communications & transportation
13
630 - Agriculture & related technologies
13
551 - Geology, hydrology & meteorology
10
658 - General management
9
140 - Specific philosophical schools
8
576 - Genetics & evolution
8
581 - Specific topics in natural history
7
800 - Literature & rhetoric
7
340 - Law
6
720 - Architecture
6
304 - Factors affecting social behavior
4
320 - Political science
4
370 - Education
4
414 - Phonology & phonetics
4
500 - Natural sciences & mathematics
4
540 - Chemistry & allied sciences
4
170 - Ethics
3
300 - Social sciences
3
612 - Human physiology
3
615 - Pharmacology & therapeutics
3
530 - Physics
2
650 - Management & auxiliary services
2
780 - Music
2
100 - Philosophy & psychology
1
361 - Social problems & social welfare in general
1
400 - Language
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1
590 - Animals (Zoology)
1
657 - Accounting
1