Classification
550 - Earth sciences
526 - Mathematical geography
55
910 - Geography & travel
27
620 - Engineering & allied operations
11
600 - Technology
10
900 - History & geography
8
333 - Economics of land & energy
4
551 - Geology, hydrology & meteorology
4
000 - Computer science, information & general works
3
363 - Other social problems & services
3
380 - Commerce, communications & transportation
3
700 - The arts; fine & decorative arts
3
320 - Political science
2
330 - Economics
2
500 - Natural sciences & mathematics
2
140 - Specific philosophical schools
1
400 - Language
1
414 - Phonology & phonetics
1
530 - Physics
1
576 - Genetics & evolution
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
770 - Photography, photographs & computer art
1