Classification
363 - Other social problems & services
576 - Genetics & evolution
600 - Technology
700 - The arts; fine & decorative arts
620 - Engineering & allied operations
23
900 - History & geography
20
333 - Economics of land & energy
18
380 - Commerce, communications & transportation
15
000 - Computer science, information & general works
12
140 - Specific philosophical schools
9
330 - Economics
9
610 - Medicine & health
9
320 - Political science
8
720 - Architecture
8
340 - Law
7
580 - Plants (Botany)
7
551 - Geology, hydrology & meteorology
6
414 - Phonology & phonetics
5
500 - Natural sciences & mathematics
5
658 - General management
5
300 - Social sciences
3
630 - Agriculture & related technologies
3
800 - Literature & rhetoric
3
170 - Ethics
2
370 - Education
2
530 - Physics
2
581 - Specific topics in natural history
2
304 - Factors affecting social behavior
1
540 - Chemistry & allied sciences
1
650 - Management & auxiliary services
1
657 - Accounting
1