Classification
330 - Economics
186
333 - Economics of land & energy
61
320 - Political science
56
304 - Factors affecting social behavior
32
336 - Public finance
31
370 - Education
30
610 - Medicine & health
30
363 - Other social problems & services
25
380 - Commerce, communications & transportation
9
006 - Special computer methods
6
630 - Agriculture & related technologies
6
004 - Data processing & computer science
5
600 - Technology
5
621 - Applied physics
5
300 - Social sciences
4
338 - Production
3
616 - Diseases
3
629 - Other branches of engineering
3
003 - Systems
2
305 - Social groups
2
339 - Macroeconomics & related topics
2
518 - Numerical analysis
2
658 - General management
2
000 - Computer science, information & general works
1
005 - Computer programming, programs & data
1
040 - [Unassigned]
1
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
155 - Differential & developmental psychology
1
306 - Culture & institutions
1
327 - International relations
1
331 - Labor economics
1
340 - Law
1
343 - Military, tax, trade & industrial law
1
346 - Private law
1
364 - Criminology
1
371 - Schools & their activities; special education
1
520 - Astronomy & allied sciences
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
570 - Life sciences; biology
1
571 - Physiology & related subjects
1
577 - Ecology
1
620 - Engineering & allied operations
1
657 - Accounting
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1