Classification
620 - Engineering & allied operations
600 - Technology
8
333 - Economics of land & energy
7
900 - History & geography
6
330 - Economics
4
363 - Other social problems & services
3
380 - Commerce, communications & transportation
3
580 - Plants (Botany)
3
000 - Computer science, information & general works
2
551 - Geology, hydrology & meteorology
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
140 - Specific philosophical schools
1
297 - Islam, Babism & Bahai Faith
1
500 - Natural sciences & mathematics
1
530 - Physics
1
550 - Earth sciences
1
581 - Specific topics in natural history
1
658 - General management
1
700 - The arts; fine & decorative arts
1