Classification
330 - Economics
363 - Other social problems & services
380 - Commerce, communications & transportation
600 - Technology
700 - The arts; fine & decorative arts
333 - Economics of land & energy
23
900 - History & geography
20
620 - Engineering & allied operations
18
000 - Computer science, information & general works
11
370 - Education
11
320 - Political science
9
140 - Specific philosophical schools
8
551 - Geology, hydrology & meteorology
8
720 - Architecture
8
610 - Medicine & health
7
658 - General management
5
576 - Genetics & evolution
4
580 - Plants (Botany)
3
400 - Language
2
500 - Natural sciences & mathematics
2
581 - Specific topics in natural history
2
657 - Accounting
2
160 - Logic
1
200 - Religion
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
340 - Law
1
410 - Linguistics
1
414 - Phonology & phonetics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
630 - Agriculture & related technologies
1
650 - Management & auxiliary services
1
800 - Literature & rhetoric
1