Classification
500 - Natural sciences & mathematics
2
658 - General management
2
670 - Manufacturing
152 - Perception, movement, emotions & drives
1
153 - Mental processes & intelligence
1
155 - Differential & developmental psychology
1
300 - Social sciences
1
302 - Social interaction
1
330 - Economics
1
380 - Commerce, communications & transportation
1
384 - Communications; telecommunication
1