Classification
100 - Philosophy & psychology
610 - Medicine & health
15
700 - The arts; fine & decorative arts
15
320 - Political science
12
900 - History & geography
11
170 - Ethics
10
200 - Religion
9
300 - Social sciences
9
333 - Economics of land & energy
9
140 - Specific philosophical schools
8
370 - Education
7
380 - Commerce, communications & transportation
7
000 - Computer science, information & general works
6
330 - Economics
6
340 - Law
6
400 - Language
6
576 - Genetics & evolution
5
620 - Engineering & allied operations
5
530 - Physics
4
600 - Technology
4
410 - Linguistics
3
580 - Plants (Botany)
3
800 - Literature & rhetoric
3
120 - Epistemology, causation & humankind
2
301 - Sociology & anthropology
2
363 - Other social problems & services
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
2
720 - Architecture
2
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
500 - Natural sciences & mathematics
1
612 - Human physiology
1
630 - Agriculture & related technologies
1
770 - Photography, photographs & computer art
1