Classification
900 - History & geography
7
320 - Political science
5
333 - Economics of land & energy
4
700 - The arts; fine & decorative arts
4
400 - Language
3
800 - Literature & rhetoric
3
330 - Economics
2
370 - Education
2
410 - Linguistics
2
780 - Music
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
340 - Law
1
363 - Other social problems & services
1
398 - Folklore
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1