Classification
650 - Management & auxiliary services
330 - Economics
210
658 - General management
206
670 - Manufacturing
148
158 - Applied psychology
145
302 - Social interaction
119
300 - Social sciences
118
500 - Natural sciences & mathematics
99
338 - Production
60
153 - Mental processes & intelligence
47
331 - Labor economics
37
150 - Psychology
28
381 - Commerce
25
384 - Communications; telecommunication
17
380 - Commerce, communications & transportation
8
620 - Engineering & allied operations
7
001 - Knowledge
6
000 - Computer science, information & general works
5
800 - Literature & rhetoric
5
004 - Data processing & computer science
4
333 - Economics of land & energy
3
700 - The arts; fine & decorative arts
3
745 - Decorative arts
3
155 - Differential & developmental psychology
2
170 - Ethics
2
332 - Financial economics
2
580 - Plants (Botany)
2
657 - Accounting
2
006 - Special computer methods
1
011 - Bibliographies
1
152 - Perception, movement, emotions & drives
1
174 - Occupational ethics
1
253 - Pastoral office & work
1
320 - Political science
1
334 - Cooperatives
1
350 - Public administration & military science
1
363 - Other social problems & services
1
510 - Mathematics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
600 - Technology
1
629 - Other branches of engineering
1
641 - Food & drink
1
651 - Office services
1
720 - Architecture
1
740 - Drawing & decorative arts
1
741 - Drawing & drawings
1