Classification
000 - Computer science, information & general works
140 - Specific philosophical schools
380 - Commerce, communications & transportation
600 - Technology
620 - Engineering & allied operations
900 - History & geography
13
700 - The arts; fine & decorative arts
11
330 - Economics
9
363 - Other social problems & services
8
333 - Economics of land & energy
7
576 - Genetics & evolution
4
610 - Medicine & health
4
400 - Language
3
630 - Agriculture & related technologies
3
720 - Architecture
3
320 - Political science
2
340 - Law
2
500 - Natural sciences & mathematics
2
658 - General management
2
370 - Education
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
657 - Accounting
1
800 - Literature & rhetoric
1