Classification
610 - Medicine & health
380 - Commerce, communications & transportation
15
370 - Education
8
000 - Computer science, information & general works
5
700 - The arts; fine & decorative arts
5
363 - Other social problems & services
4
100 - Philosophy & psychology
3
306 - Culture & institutions
2
330 - Economics
2
600 - Technology
2
613 - Personal health & safety
2
616 - Diseases
2
333 - Economics of land & energy
1
340 - Law
1
400 - Language
1
620 - Engineering & allied operations
1