Classification
363 - Other social problems & services
16
333 - Economics of land & energy
15
700 - The arts; fine & decorative arts
14
330 - Economics
13
600 - Technology
13
320 - Political science
10
900 - History & geography
10
620 - Engineering & allied operations
8
370 - Education
6
380 - Commerce, communications & transportation
6
610 - Medicine & health
6
000 - Computer science, information & general works
3
551 - Geology, hydrology & meteorology
3
170 - Ethics
2
340 - Law
2
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
658 - General management
2
140 - Specific philosophical schools
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
657 - Accounting
1
720 - Architecture
1
800 - Literature & rhetoric
1