Classification
000 - Computer science, information & general works
2
610 - Medicine & health
2
658 - General management
900 - History & geography
140 - Specific philosophical schools
1
170 - Ethics
1
330 - Economics
1
333 - Economics of land & energy
1
370 - Education
1
380 - Commerce, communications & transportation
1
580 - Plants (Botany)
1
600 - Technology
1
630 - Agriculture & related technologies
1