Classification
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
333 - Economics of land & energy
15
330 - Economics
12
600 - Technology
7
610 - Medicine & health
7
000 - Computer science, information & general works
6
320 - Political science
6
363 - Other social problems & services
6
900 - History & geography
4
140 - Specific philosophical schools
3
361 - Social problems & social welfare in general
3
370 - Education
3
410 - Linguistics
3
340 - Law
2
400 - Language
2
500 - Natural sciences & mathematics
2
530 - Physics
2
612 - Human physiology
2
620 - Engineering & allied operations
2
160 - Logic
1
200 - Religion
1
304 - Factors affecting social behavior
1
336 - Public finance
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
657 - Accounting
1
658 - General management
1
800 - Literature & rhetoric
1