Classification
380 - Commerce, communications & transportation
580 - Plants (Botany)
000 - Computer science, information & general works
65
700 - The arts; fine & decorative arts
65
333 - Economics of land & energy
63
610 - Medicine & health
54
600 - Technology
49
620 - Engineering & allied operations
43
363 - Other social problems & services
42
900 - History & geography
34
140 - Specific philosophical schools
32
551 - Geology, hydrology & meteorology
30
330 - Economics
28
630 - Agriculture & related technologies
21
581 - Specific topics in natural history
18
576 - Genetics & evolution
14
612 - Human physiology
14
540 - Chemistry & allied sciences
13
500 - Natural sciences & mathematics
12
320 - Political science
11
340 - Law
11
414 - Phonology & phonetics
10
370 - Education
9
530 - Physics
8
658 - General management
8
720 - Architecture
8
304 - Factors affecting social behavior
7
800 - Literature & rhetoric
7
300 - Social sciences
5
400 - Language
5
170 - Ethics
4
615 - Pharmacology & therapeutics
4
100 - Philosophy & psychology
2
410 - Linguistics
2
301 - Sociology & anthropology
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
657 - Accounting
1
780 - Music
1