Classification
600 - Technology
610 - Medicine & health
900 - History & geography
370 - Education
7
333 - Economics of land & energy
5
363 - Other social problems & services
5
620 - Engineering & allied operations
5
320 - Political science
3
330 - Economics
3
380 - Commerce, communications & transportation
3
000 - Computer science, information & general works
2
300 - Social sciences
2
400 - Language
2
500 - Natural sciences & mathematics
2
540 - Chemistry & allied sciences
2
658 - General management
2
700 - The arts; fine & decorative arts
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
410 - Linguistics
1
576 - Genetics & evolution
1
800 - Literature & rhetoric
1