Classification
302 - Social interaction
4
306 - Culture & institutions
4
600 - Technology
4
303 - Social processes
3
320 - Political science
3
338 - Production
3
380 - Commerce, communications & transportation
3
140 - Specific philosophical schools
2
658 - General management
2
700 - The arts; fine & decorative arts
2
330 - Economics
1
370 - Education
1
500 - Natural sciences & mathematics
1
599 - Mammals
1
621 - Applied physics
1
660 - Chemical engineering
1
791 - Public performances
1
800 - Literature & rhetoric
1
900 - History & geography
1