Classification
170 - Ethics
330 - Economics
42
300 - Social sciences
9
320 - Political science
8
363 - Other social problems & services
8
333 - Economics of land & energy
6
658 - General management
6
140 - Specific philosophical schools
5
600 - Technology
5
100 - Philosophy & psychology
4
340 - Law
4
900 - History & geography
4
331 - Labor economics
3
620 - Engineering & allied operations
3
000 - Computer science, information & general works
2
200 - Religion
2
302 - Social interaction
2
361 - Social problems & social welfare in general
2
370 - Education
2
380 - Commerce, communications & transportation
2
610 - Medicine & health
2
659 - Advertising & public relations
2
700 - The arts; fine & decorative arts
2
004 - Data processing & computer science
1
158 - Applied psychology
1
297 - Islam, Babism & Bahai Faith
1
332 - Financial economics
1
338 - Production
1
368 - Insurance
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
650 - Management & auxiliary services
1
670 - Manufacturing
1