Classification
658 - General management
238
070 - News media, journalism & publishing
218
005 - Computer programming, programs & data
176
302 - Social interaction
134
004 - Data processing & computer science
130
006 - Special computer methods
121
306 - Culture & institutions
116
519 - Probabilities & applied mathematics
100
304 - Factors affecting social behavior
97
320 - Political science
97
616 - Diseases
94
620 - Engineering & allied operations
87
610 - Medicine & health
76
621 - Applied physics
70
330 - Economics
63
551 - Geology, hydrology & meteorology
55
809 - History, description & criticism
54
541 - Physical chemistry
47
300 - Social sciences
44
370 - Education
44
338 - Production
42
547 - Organic chemistry
42
327 - International relations
37
510 - Mathematics
37
570 - Life sciences; biology
37
571 - Physiology & related subjects
37
418 - Standard usage & applied linguistics
36
305 - Social groups
34
003 - Systems
32
333 - Economics of land & energy
31
617 - Surgery & related medical specialties
31
515 - Analysis
29
629 - Other branches of engineering
28
530 - Physics
26
615 - Pharmacology & therapeutics
26
301 - Sociology & anthropology
25
363 - Other social problems & services
25
371 - Schools & their activities; special education
25
910 - Geography & travel
25
303 - Social processes
23
550 - Earth sciences
23
025 - Library operations
21
332 - Financial economics
20
150 - Psychology
18
543 - Analytical chemistry
18
580 - Plants (Botany)
17
664 - Food technology
17
791 - Public performances
17
518 - Numerical analysis
16
641 - Food & drink
16
more ...