Classification
170 - Ethics
330 - Economics
380 - Commerce, communications & transportation
000 - Computer science, information & general works
5
320 - Political science
5
140 - Specific philosophical schools
4
658 - General management
4
174 - Occupational ethics
3
384 - Communications; telecommunication
3
551 - Geology, hydrology & meteorology
3
700 - The arts; fine & decorative arts
3
300 - Social sciences
2
340 - Law
2
363 - Other social problems & services
2
600 - Technology
2
620 - Engineering & allied operations
2
900 - History & geography
2
100 - Philosophy & psychology
1
158 - Applied psychology
1
200 - Religion
1
302 - Social interaction
1
333 - Economics of land & energy
1
338 - Production
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
370 - Education
1
414 - Phonology & phonetics
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
650 - Management & auxiliary services
1