Classification
000 - Computer science, information & general works
58
380 - Commerce, communications & transportation
551 - Geology, hydrology & meteorology
333 - Economics of land & energy
32
363 - Other social problems & services
28
700 - The arts; fine & decorative arts
28
330 - Economics
26
580 - Plants (Botany)
24
320 - Political science
22
140 - Specific philosophical schools
16
610 - Medicine & health
13
600 - Technology
12
620 - Engineering & allied operations
12
414 - Phonology & phonetics
10
630 - Agriculture & related technologies
10
900 - History & geography
9
576 - Genetics & evolution
8
581 - Specific topics in natural history
7
370 - Education
6
540 - Chemistry & allied sciences
6
500 - Natural sciences & mathematics
5
612 - Human physiology
5
304 - Factors affecting social behavior
4
530 - Physics
4
720 - Architecture
4
800 - Literature & rhetoric
4
300 - Social sciences
3
657 - Accounting
2
658 - General management
2
100 - Philosophy & psychology
1
170 - Ethics
1
340 - Law
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
400 - Language
1
550 - Earth sciences
1