Classification
300 - Social sciences
363 - Other social problems & services
610 - Medicine & health
5
620 - Engineering & allied operations
5
140 - Specific philosophical schools
4
380 - Commerce, communications & transportation
4
700 - The arts; fine & decorative arts
4
000 - Computer science, information & general works
3
333 - Economics of land & energy
3
414 - Phonology & phonetics
3
500 - Natural sciences & mathematics
3
540 - Chemistry & allied sciences
3
551 - Geology, hydrology & meteorology
3
576 - Genetics & evolution
3
580 - Plants (Botany)
3
581 - Specific topics in natural history
3
612 - Human physiology
3
100 - Philosophy & psychology
1
170 - Ethics
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
320 - Political science
1
330 - Economics
1
340 - Law
1
370 - Education
1
600 - Technology
1
630 - Agriculture & related technologies
1
720 - Architecture
1
800 - Literature & rhetoric
1
900 - History & geography
1