Classification
380 - Commerce, communications & transportation
580 - Plants (Botany)
3
100 - Philosophy & psychology
2
333 - Economics of land & energy
2
576 - Genetics & evolution
2
610 - Medicine & health
2
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
2
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1