Classification
153 - Mental processes & intelligence
115
363 - Other social problems & services
106
612 - Human physiology
105
006 - Special computer methods
104
338 - Production
101
005 - Computer programming, programs & data
79
004 - Data processing & computer science
77
303 - Social processes
70
415 - Grammar
67
333 - Economics of land & energy
65
302 - Social interaction
63
128 - Humankind
61
401 - Philosophy & theory
58
616 - Diseases
55
330 - Economics
50
332 - Financial economics
49
621 - Applied physics
45
794 - Indoor games of skill
42
121 - Epistemology
39
658 - General management
38
306 - Culture & institutions
34
152 - Perception, movement, emotions & drives
33
001 - Knowledge
31
307 - Communities
30
339 - Macroeconomics & related topics
29
362 - Social welfare problems & services
28
155 - Differential & developmental psychology
26
174 - Occupational ethics
25
629 - Other branches of engineering
24
384 - Communications; telecommunication
22
781 - General principles & musical forms
21
170 - Ethics
20
620 - Engineering & allied operations
19
150 - Psychology
18
304 - Factors affecting social behavior
18
576 - Genetics & evolution
18
025 - Library operations
17
320 - Political science
17
720 - Architecture
17
591 - Specific topics in natural history
16
191 - Philosophy of United States & Canada
15
331 - Labor economics
15
382 - International commerce
15
336 - Public finance
14
371 - Schools & their activities; special education
14
126 - The self
13
410 - Linguistics
13
501 - Philosophy & theory
13
519 - Probabilities & applied mathematics
13
700 - The arts; fine & decorative arts
13
more ...