Classification
363 - Other social problems & services
620 - Engineering & allied operations
658 - General management
333 - Economics of land & energy
3
380 - Commerce, communications & transportation
3
600 - Technology
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
330 - Economics
2
580 - Plants (Botany)
2
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
297 - Islam, Babism & Bahai Faith
1
370 - Education
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1