Classification
600 - Technology
620 - Engineering & allied operations
41
700 - The arts; fine & decorative arts
41
333 - Economics of land & energy
34
900 - History & geography
31
330 - Economics
21
363 - Other social problems & services
21
000 - Computer science, information & general works
17
610 - Medicine & health
16
580 - Plants (Botany)
15
140 - Specific philosophical schools
14
380 - Commerce, communications & transportation
9
500 - Natural sciences & mathematics
9
540 - Chemistry & allied sciences
9
551 - Geology, hydrology & meteorology
5
576 - Genetics & evolution
5
370 - Education
4
340 - Law
3
530 - Physics
3
630 - Agriculture & related technologies
3
800 - Literature & rhetoric
3
100 - Philosophy & psychology
2
300 - Social sciences
2
414 - Phonology & phonetics
2
581 - Specific topics in natural history
2
612 - Human physiology
2
720 - Architecture
2
120 - Epistemology, causation & humankind
1
304 - Factors affecting social behavior
1
361 - Social problems & social welfare in general
1
550 - Earth sciences
1
658 - General management
1
770 - Photography, photographs & computer art
1