Classification
100 - Philosophy & psychology
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
600 - Technology
19
900 - History & geography
13
610 - Medicine & health
10
330 - Economics
9
333 - Economics of land & energy
9
370 - Education
8
320 - Political science
7
363 - Other social problems & services
6
380 - Commerce, communications & transportation
6
000 - Computer science, information & general works
5
140 - Specific philosophical schools
5
720 - Architecture
5
300 - Social sciences
4
500 - Natural sciences & mathematics
3
576 - Genetics & evolution
3
580 - Plants (Botany)
3
630 - Agriculture & related technologies
3
780 - Music
3
340 - Law
2
400 - Language
2
410 - Linguistics
2
530 - Physics
2
540 - Chemistry & allied sciences
2
658 - General management
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
770 - Photography, photographs & computer art
1
791 - Public performances
1