Classification
303 - Social processes
302 - Social interaction
4
658 - General management
4
330 - Economics
3
338 - Production
2
153 - Mental processes & intelligence
1
170 - Ethics
1
300 - Social sciences
1
324 - The political process
1
331 - Labor economics
1
384 - Communications; telecommunication
1
500 - Natural sciences & mathematics
1
620 - Engineering & allied operations
1