Classification
900 - History & geography
320 - Political science
15
800 - Literature & rhetoric
14
200 - Religion
11
340 - Law
10
100 - Philosophy & psychology
9
300 - Social sciences
9
330 - Economics
8
140 - Specific philosophical schools
7
333 - Economics of land & energy
7
700 - The arts; fine & decorative arts
7
380 - Commerce, communications & transportation
6
301 - Sociology & anthropology
4
370 - Education
4
600 - Technology
4
610 - Medicine & health
4
170 - Ethics
3
410 - Linguistics
3
000 - Computer science, information & general works
2
304 - Factors affecting social behavior
2
361 - Social problems & social welfare in general
2
580 - Plants (Botany)
2
620 - Engineering & allied operations
2
658 - General management
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
296 - Judaism
1
297 - Islam, Babism & Bahai Faith
1
363 - Other social problems & services
1
364 - Criminology
1
400 - Language
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
770 - Photography, photographs & computer art
1
780 - Music
1