Classification
004 - Data processing & computer science
102
005 - Computer programming, programs & data
99
006 - Special computer methods
87
658 - General management
72
620 - Engineering & allied operations
45
621 - Applied physics
43
616 - Diseases
31
320 - Political science
29
629 - Other branches of engineering
20
338 - Production
19
304 - Factors affecting social behavior
18
617 - Surgery & related medical specialties
18
515 - Analysis
16
571 - Physiology & related subjects
16
330 - Economics
15
306 - Culture & institutions
14
327 - International relations
14
370 - Education
13
510 - Mathematics
13
610 - Medicine & health
13
332 - Financial economics
12
333 - Economics of land & energy
12
371 - Schools & their activities; special education
12
150 - Psychology
11
305 - Social groups
11
363 - Other social problems & services
11
530 - Physics
11
660 - Chemical engineering
11
003 - Systems
10
628 - Sanitary & municipal engineering
10
341 - Law of nations
9
519 - Probabilities & applied mathematics
9
580 - Plants (Botany)
9
809 - History, description & criticism
9
302 - Social interaction
8
577 - Ecology
8
612 - Human physiology
8
615 - Pharmacology & therapeutics
8
670 - Manufacturing
8
690 - Buildings
8
300 - Social sciences
7
378 - Higher education
7
551 - Geology, hydrology & meteorology
7
570 - Life sciences; biology
7
614 - Incidence & prevention of disease
7
630 - Agriculture & related technologies
7
158 - Applied psychology
6
303 - Social processes
6
343 - Military, tax, trade & industrial law
6
550 - Earth sciences
6
more ...