Classification
500 - Natural sciences & mathematics
576 - Genetics & evolution
600 - Technology
620 - Engineering & allied operations
16
900 - History & geography
700 - The arts; fine & decorative arts
15
333 - Economics of land & energy
8
380 - Commerce, communications & transportation
6
363 - Other social problems & services
5
140 - Specific philosophical schools
4
330 - Economics
4
340 - Law
4
720 - Architecture
4
000 - Computer science, information & general works
3
320 - Political science
3
610 - Medicine & health
2
100 - Philosophy & psychology
1
300 - Social sciences
1
370 - Education
1
410 - Linguistics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
658 - General management
1