Classification
006 - Special computer methods
90
658 - General management
75
621 - Applied physics
61
620 - Engineering & allied operations
49
320 - Political science
39
005 - Computer programming, programs & data
37
616 - Diseases
37
004 - Data processing & computer science
28
610 - Medicine & health
24
306 - Culture & institutions
22
629 - Other branches of engineering
22
624 - Civil engineering
19
330 - Economics
18
304 - Factors affecting social behavior
17
551 - Geology, hydrology & meteorology
17
333 - Economics of land & energy
16
340 - Law
14
690 - Buildings
14
571 - Physiology & related subjects
13
615 - Pharmacology & therapeutics
13
003 - Systems
12
305 - Social groups
12
338 - Production
12
910 - Geography & travel
12
302 - Social interaction
11
370 - Education
11
530 - Physics
11
670 - Manufacturing
11
809 - History, description & criticism
11
301 - Sociology & anthropology
10
327 - International relations
10
510 - Mathematics
10
628 - Sanitary & municipal engineering
10
515 - Analysis
9
150 - Psychology
8
343 - Military, tax, trade & industrial law
8
363 - Other social problems & services
8
519 - Probabilities & applied mathematics
8
617 - Surgery & related medical specialties
8
001 - Knowledge
7
332 - Financial economics
7
371 - Schools & their activities; special education
7
612 - Human physiology
7
660 - Chemical engineering
7
720 - Architecture
7
341 - Law of nations
6
570 - Life sciences; biology
6
572 - Biochemistry
6
580 - Plants (Botany)
6
650 - Management & auxiliary services
6
more ...