Classification
380 - Commerce, communications & transportation
580 - Plants (Botany)
000 - Computer science, information & general works
65
700 - The arts; fine & decorative arts
63
333 - Economics of land & energy
61
610 - Medicine & health
53
600 - Technology
48
620 - Engineering & allied operations
43
363 - Other social problems & services
41
140 - Specific philosophical schools
32
551 - Geology, hydrology & meteorology
30
900 - History & geography
30
330 - Economics
24
630 - Agriculture & related technologies
19
581 - Specific topics in natural history
17
576 - Genetics & evolution
14
612 - Human physiology
14
500 - Natural sciences & mathematics
12
540 - Chemistry & allied sciences
12
340 - Law
11
414 - Phonology & phonetics
10
320 - Political science
9
370 - Education
9
530 - Physics
8
658 - General management
8
720 - Architecture
8
800 - Literature & rhetoric
7
304 - Factors affecting social behavior
6
300 - Social sciences
5
615 - Pharmacology & therapeutics
4
170 - Ethics
3
400 - Language
3
100 - Philosophy & psychology
2
301 - Sociology & anthropology
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
657 - Accounting
1
780 - Music
1