Classification
800 - Literature & rhetoric
900 - History & geography
9
700 - The arts; fine & decorative arts
8
000 - Computer science, information & general works
6
600 - Technology
6
620 - Engineering & allied operations
6
363 - Other social problems & services
5
610 - Medicine & health
5
333 - Economics of land & energy
4
330 - Economics
3
380 - Commerce, communications & transportation
3
540 - Chemistry & allied sciences
3
580 - Plants (Botany)
3
140 - Specific philosophical schools
2
300 - Social sciences
2
304 - Factors affecting social behavior
2
370 - Education
2
500 - Natural sciences & mathematics
2
576 - Genetics & evolution
2
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
320 - Political science
1
340 - Law
1
658 - General management
1
720 - Architecture
1