Classification
330 - Economics
24
300 - Social sciences
14
519 - Probabilities & applied mathematics
12
001 - Knowledge
8
301 - Sociology & anthropology
8
900 - History & geography
8
160 - Logic
6
610 - Medicine & health
6
510 - Mathematics
5
658 - General management
5
304 - Factors affecting social behavior
4
363 - Other social problems & services
4
500 - Natural sciences & mathematics
4
600 - Technology
4
006 - Special computer methods
3
320 - Political science
3
331 - Labor economics
3
333 - Economics of land & energy
3
370 - Education
3
616 - Diseases
3
005 - Computer programming, programs & data
2
302 - Social interaction
2
362 - Social welfare problems & services
2
378 - Higher education
2
380 - Commerce, communications & transportation
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
011 - Bibliographies
1
150 - Psychology
1
306 - Culture & institutions
1
338 - Production
1
339 - Macroeconomics & related topics
1
340 - Law
1
371 - Schools & their activities; special education
1
384 - Communications; telecommunication
1
547 - Organic chemistry
1
612 - Human physiology
1
614 - Incidence & prevention of disease
1
620 - Engineering & allied operations
1
621 - Applied physics
1
630 - Agriculture & related technologies
1
670 - Manufacturing
1
690 - Buildings
1