Classification
333 - Economics of land & energy
000 - Computer science, information & general works
7
700 - The arts; fine & decorative arts
7
500 - Natural sciences & mathematics
5
600 - Technology
5
340 - Law
4
620 - Engineering & allied operations
3
900 - History & geography
3
330 - Economics
2
100 - Philosophy & psychology
1
320 - Political science
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
530 - Physics
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
610 - Medicine & health
1
621 - Applied physics
1
720 - Architecture
1