Classification
400 - Language
540 - Chemistry & allied sciences
600 - Technology
620 - Engineering & allied operations
3
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
2
900 - History & geography
2
330 - Economics
1
340 - Law
1
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
580 - Plants (Botany)
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1