Classification
300 - Social sciences
330 - Economics
32
658 - General management
30
302 - Social interaction
14
320 - Political science
14
338 - Production
12
001 - Knowledge
11
331 - Labor economics
11
500 - Natural sciences & mathematics
11
670 - Manufacturing
9
170 - Ethics
5
301 - Sociology & anthropology
5
158 - Applied psychology
4
340 - Law
4
100 - Philosophy & psychology
3
304 - Factors affecting social behavior
3
610 - Medicine & health
3
650 - Management & auxiliary services
3
900 - History & geography
3
000 - Computer science, information & general works
2
153 - Mental processes & intelligence
2
333 - Economics of land & energy
2
371 - Schools & their activities; special education
2
380 - Commerce, communications & transportation
2
384 - Communications; telecommunication
2
700 - The arts; fine & decorative arts
2
004 - Data processing & computer science
1
140 - Specific philosophical schools
1
200 - Religion
1
303 - Social processes
1
332 - Financial economics
1
337 - International economics
1
350 - Public administration & military science
1
352 - General considerations of public administration
1
363 - Other social problems & services
1
370 - Education
1
381 - Commerce
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
745 - Decorative arts
1
791 - Public performances
1
800 - Literature & rhetoric
1