Classification
330 - Economics
113
006 - Special computer methods
105
005 - Computer programming, programs & data
80
004 - Data processing & computer science
73
333 - Economics of land & energy
42
320 - Political science
41
621 - Applied physics
41
304 - Factors affecting social behavior
36
658 - General management
33
620 - Engineering & allied operations
30
338 - Production
27
616 - Diseases
23
577 - Ecology
20
629 - Other branches of engineering
19
306 - Culture & institutions
18
327 - International relations
18
551 - Geology, hydrology & meteorology
18
610 - Medicine & health
18
630 - Agriculture & related technologies
18
331 - Labor economics
17
380 - Commerce, communications & transportation
16
617 - Surgery & related medical specialties
15
370 - Education
13
332 - Financial economics
12
300 - Social sciences
11
301 - Sociology & anthropology
11
303 - Social processes
11
363 - Other social problems & services
11
371 - Schools & their activities; special education
11
910 - Geography & travel
11
003 - Systems
10
340 - Law
10
500 - Natural sciences & mathematics
10
900 - History & geography
10
518 - Numerical analysis
9
615 - Pharmacology & therapeutics
9
660 - Chemical engineering
9
337 - International economics
7
384 - Communications; telecommunication
7
520 - Astronomy & allied sciences
7
550 - Earth sciences
7
580 - Plants (Botany)
7
025 - Library operations
6
378 - Higher education
6
381 - Commerce
6
510 - Mathematics
6
570 - Life sciences; biology
6
600 - Technology
6
650 - Management & auxiliary services
6
302 - Social interaction
5
more ...