Classification
330 - Economics
55
320 - Political science
43
658 - General management
29
519 - Probabilities & applied mathematics
25
300 - Social sciences
23
370 - Education
23
306 - Culture & institutions
20
301 - Sociology & anthropology
15
612 - Human physiology
14
304 - Factors affecting social behavior
13
005 - Computer programming, programs & data
12
302 - Social interaction
12
331 - Labor economics
12
510 - Mathematics
11
621 - Applied physics
11
641 - Food & drink
11
664 - Food technology
11
340 - Law
10
150 - Psychology
9
363 - Other social problems & services
9
900 - History & geography
9
004 - Data processing & computer science
8
327 - International relations
8
332 - Financial economics
8
410 - Linguistics
8
610 - Medicine & health
8
003 - Systems
7
380 - Commerce, communications & transportation
7
551 - Geology, hydrology & meteorology
7
617 - Surgery & related medical specialties
7
870 - Italic literatures; Latin literature
7
000 - Computer science, information & general works
6
100 - Philosophy & psychology
6
200 - Religion
6
338 - Production
6
616 - Diseases
6
006 - Special computer methods
5
155 - Differential & developmental psychology
5
303 - Social processes
5
305 - Social groups
5
364 - Criminology
5
512 - Algebra
5
516 - Geometry
5
620 - Engineering & allied operations
5
700 - The arts; fine & decorative arts
5
809 - History, description & criticism
5
170 - Ethics
4
333 - Economics of land & energy
4
344 - Labor, social, education & cultural law
4
361 - Social problems & social welfare in general
4
more ...