Classification
380 - Commerce, communications & transportation
610 - Medicine & health
3
330 - Economics
2
370 - Education
2
600 - Technology
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
333 - Economics of land & energy
1
580 - Plants (Botany)
1
700 - The arts; fine & decorative arts
1
780 - Music
1