Classification
300 - Social sciences
900 - History & geography
140 - Specific philosophical schools
5
380 - Commerce, communications & transportation
5
700 - The arts; fine & decorative arts
5
100 - Philosophy & psychology
4
320 - Political science
4
200 - Religion
3
333 - Economics of land & energy
3
610 - Medicine & health
3
301 - Sociology & anthropology
2
400 - Language
2
600 - Technology
2
297 - Islam, Babism & Bahai Faith
1
330 - Economics
1
370 - Education
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
780 - Music
1
791 - Public performances
1
800 - Literature & rhetoric
1