Classification
600 - Technology
620 - Engineering & allied operations
6
900 - History & geography
6
700 - The arts; fine & decorative arts
4
000 - Computer science, information & general works
3
140 - Specific philosophical schools
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1