Classification
500 - Natural sciences & mathematics
700 - The arts; fine & decorative arts
35
000 - Computer science, information & general works
34
333 - Economics of land & energy
26
620 - Engineering & allied operations
24
600 - Technology
23
900 - History & geography
15
340 - Law
13
380 - Commerce, communications & transportation
11
576 - Genetics & evolution
11
330 - Economics
9
363 - Other social problems & services
7
530 - Physics
5
720 - Architecture
5
320 - Political science
4
140 - Specific philosophical schools
3
540 - Chemistry & allied sciences
3
551 - Geology, hydrology & meteorology
3
580 - Plants (Botany)
3
610 - Medicine & health
3
120 - Epistemology, causation & humankind
2
400 - Language
2
414 - Phonology & phonetics
2
510 - Mathematics
2
532 - Fluid mechanics; liquid mechanics
2
612 - Human physiology
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
300 - Social sciences
1
370 - Education
1
531 - Classical mechanics; solid mechanics
1
536 - Heat
1
581 - Specific topics in natural history
1
629 - Other branches of engineering
1
658 - General management
1
660 - Chemical engineering
1