Classification
658 - General management
300 - Social sciences
8
338 - Production
8
500 - Natural sciences & mathematics
7
302 - Social interaction
6
330 - Economics
6
381 - Commerce
6
301 - Sociology & anthropology
5
331 - Labor economics
5
006 - Special computer methods
4
670 - Manufacturing
3
140 - Specific philosophical schools
2
306 - Culture & institutions
2
363 - Other social problems & services
2
100 - Philosophy & psychology
1
158 - Applied psychology
1
324 - The political process
1
371 - Schools & their activities; special education
1
380 - Commerce, communications & transportation
1
384 - Communications; telecommunication
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1
600 - Technology
1
621 - Applied physics
1
659 - Advertising & public relations
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1