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