Classification
700 - The arts; fine & decorative arts
600 - Technology
22
333 - Economics of land & energy
16
620 - Engineering & allied operations
15
000 - Computer science, information & general works
13
900 - History & geography
13
363 - Other social problems & services
12
380 - Commerce, communications & transportation
12
330 - Economics
9
720 - Architecture
7
140 - Specific philosophical schools
6
370 - Education
5
551 - Geology, hydrology & meteorology
5
580 - Plants (Botany)
5
610 - Medicine & health
4
576 - Genetics & evolution
3
658 - General management
3
100 - Philosophy & psychology
2
320 - Political science
2
340 - Law
2
400 - Language
2
630 - Agriculture & related technologies
2
120 - Epistemology, causation & humankind
1
200 - Religion
1
304 - Factors affecting social behavior
1
500 - Natural sciences & mathematics
1
530 - Physics
1
612 - Human physiology
1
770 - Photography, photographs & computer art
1
791 - Public performances
1
800 - Literature & rhetoric
1