Classification
580 - Plants (Botany)
600 - Technology
630 - Agriculture & related technologies
620 - Engineering & allied operations
33
000 - Computer science, information & general works
24
333 - Economics of land & energy
22
700 - The arts; fine & decorative arts
20
363 - Other social problems & services
15
610 - Medicine & health
12
900 - History & geography
12
330 - Economics
8
380 - Commerce, communications & transportation
8
551 - Geology, hydrology & meteorology
7
720 - Architecture
6
340 - Law
5
658 - General management
5
576 - Genetics & evolution
4
140 - Specific philosophical schools
3
414 - Phonology & phonetics
3
800 - Literature & rhetoric
3
170 - Ethics
2
300 - Social sciences
2
320 - Political science
2
612 - Human physiology
2
100 - Philosophy & psychology
1
304 - Factors affecting social behavior
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
370 - Education
1
500 - Natural sciences & mathematics
1
581 - Specific topics in natural history
1
770 - Photography, photographs & computer art
1