Classification
650 - Management & auxiliary services
658 - General management
286
330 - Economics
202
500 - Natural sciences & mathematics
147
158 - Applied psychology
130
300 - Social sciences
118
302 - Social interaction
112
670 - Manufacturing
100
153 - Mental processes & intelligence
58
338 - Production
49
331 - Labor economics
32
381 - Commerce
25
384 - Communications; telecommunication
12
620 - Engineering & allied operations
10
006 - Special computer methods
8
150 - Psychology
8
380 - Commerce, communications & transportation
6
004 - Data processing & computer science
5
155 - Differential & developmental psychology
5
333 - Economics of land & energy
5
001 - Knowledge
4
700 - The arts; fine & decorative arts
4
000 - Computer science, information & general works
3
005 - Computer programming, programs & data
3
020 - Library & information sciences
3
152 - Perception, movement, emotions & drives
3
363 - Other social problems & services
3
657 - Accounting
3
350 - Public administration & military science
2
580 - Plants (Botany)
2
659 - Advertising & public relations
2
745 - Decorative arts
2
800 - Literature & rhetoric
2
170 - Ethics
1
303 - Social processes
1
305 - Social groups
1
320 - Political science
1
332 - Financial economics
1
510 - Mathematics
1
519 - Probabilities & applied mathematics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
600 - Technology
1
610 - Medicine & health
1
629 - Other branches of engineering
1
651 - Office services
1
741 - Drawing & drawings
1
790 - Recreational & performing arts
1