Classification
500 - Natural sciences & mathematics
330 - Economics
8
658 - General management
8
300 - Social sciences
6
302 - Social interaction
6
670 - Manufacturing
5
620 - Engineering & allied operations
4
331 - Labor economics
3
384 - Communications; telecommunication
2
650 - Management & auxiliary services
2
150 - Psychology
1
153 - Mental processes & intelligence
1
158 - Applied psychology
1
338 - Production
1
380 - Commerce, communications & transportation
1
510 - Mathematics
1
520 - Astronomy & allied sciences
1
613 - Personal health & safety
1