Classification
791 - Public performances
133
700 - The arts; fine & decorative arts
38
900 - History & geography
34
380 - Commerce, communications & transportation
26
320 - Political science
18
330 - Economics
18
600 - Technology
15
333 - Economics of land & energy
14
000 - Computer science, information & general works
12
800 - Literature & rhetoric
10
140 - Specific philosophical schools
9
370 - Education
8
100 - Philosophy & psychology
6
363 - Other social problems & services
6
300 - Social sciences
5
620 - Engineering & allied operations
5
658 - General management
5
576 - Genetics & evolution
4
610 - Medicine & health
4
770 - Photography, photographs & computer art
4
400 - Language
3
581 - Specific topics in natural history
3
780 - Music
3
170 - Ethics
2
200 - Religion
2
301 - Sociology & anthropology
2
340 - Law
2
361 - Social problems & social welfare in general
2
720 - Architecture
2
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1