Classification
720 - Architecture
900 - History & geography
700 - The arts; fine & decorative arts
9
620 - Engineering & allied operations
5
140 - Specific philosophical schools
4
200 - Religion
4
600 - Technology
4
330 - Economics
3
340 - Law
3
363 - Other social problems & services
3
380 - Commerce, communications & transportation
3
800 - Literature & rhetoric
3
297 - Islam, Babism & Bahai Faith
2
333 - Economics of land & energy
2
551 - Geology, hydrology & meteorology
2
610 - Medicine & health
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
170 - Ethics
1
300 - Social sciences
1
301 - Sociology & anthropology
1
320 - Political science
1
370 - Education
1
398 - Folklore
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
770 - Photography, photographs & computer art
1
780 - Music
1