Classification
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
780 - Music
900 - History & geography
2
000 - Computer science, information & general works
1
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1
580 - Plants (Botany)
1
600 - Technology
1
620 - Engineering & allied operations
1