Classification
330 - Economics
361 - Social problems & social welfare in general
320 - Political science
30
610 - Medicine & health
29
333 - Economics of land & energy
22
700 - The arts; fine & decorative arts
18
000 - Computer science, information & general works
11
300 - Social sciences
9
140 - Specific philosophical schools
8
360 - Social problems & services; associations
8
363 - Other social problems & services
8
370 - Education
8
380 - Commerce, communications & transportation
8
600 - Technology
7
100 - Philosophy & psychology
6
658 - General management
6
304 - Factors affecting social behavior
5
500 - Natural sciences & mathematics
5
340 - Law
4
580 - Plants (Botany)
4
170 - Ethics
3
332 - Financial economics
3
338 - Production
3
551 - Geology, hydrology & meteorology
3
620 - Engineering & allied operations
3
630 - Agriculture & related technologies
3
900 - History & geography
3
301 - Sociology & anthropology
2
331 - Labor economics
2
350 - Public administration & military science
2
372 - Elementary education
2
576 - Genetics & evolution
2
001 - Knowledge
1
200 - Religion
1
306 - Culture & institutions
1
336 - Public finance
1
364 - Criminology
1
371 - Schools & their activities; special education
1
540 - Chemistry & allied sciences
1
612 - Human physiology
1
650 - Management & auxiliary services
1
670 - Manufacturing
1
791 - Public performances
1
800 - Literature & rhetoric
1