Classification
000 - Computer science, information & general works
3
001 - Knowledge
1
149 - Other philosophical systems
1
150 - Psychology
4
152 - Perception, movement, emotions & drives
2
153 - Mental processes & intelligence
9
155 - Differential & developmental psychology
5
158 - Applied psychology
45
170 - Ethics
1
302 - Social interaction
1
330 - Economics
18
331 - Labor economics
3
332 - Financial economics
1
333 - Economics of land & energy
1
338 - Production
3
380 - Commerce, communications & transportation
1
381 - Commerce
4
384 - Communications; telecommunication
2
500 - Natural sciences & mathematics
1
650 - Management & auxiliary services
17
651 - Office services
1
658 - General management
12
659 - Advertising & public relations
1
670 - Manufacturing
1
796 - Athletic & outdoor sports & games
1