Classification
320 - Political science
9
301 - Sociology & anthropology
7
616 - Diseases
7
000 - Computer science, information & general works
6
305 - Social groups
6
330 - Economics
6
610 - Medicine & health
6
658 - General management
6
300 - Social sciences
5
306 - Culture & institutions
5
338 - Production
5
621 - Applied physics
5
006 - Special computer methods
4
304 - Factors affecting social behavior
4
620 - Engineering & allied operations
4
809 - History, description & criticism
4
004 - Data processing & computer science
3
140 - Specific philosophical schools
3
333 - Economics of land & energy
3
514 - Topology
3
515 - Analysis
3
516 - Geometry
3
519 - Probabilities & applied mathematics
3
571 - Physiology & related subjects
3
150 - Psychology
2
302 - Social interaction
2
361 - Social problems & social welfare in general
2
362 - Social welfare problems & services
2
363 - Other social problems & services
2
378 - Higher education
2
380 - Commerce, communications & transportation
2
510 - Mathematics
2
511 - General principles of mathematics
2
530 - Physics
2
577 - Ecology
2
612 - Human physiology
2
900 - History & geography
2
005 - Computer programming, programs & data
1
020 - Library & information sciences
1
025 - Library operations
1
120 - Epistemology, causation & humankind
1
170 - Ethics
1
174 - Occupational ethics
1
240 - Christian moral & devotional theology
1
297 - Islam, Babism & Bahai Faith
1
303 - Social processes
1
324 - The political process
1
327 - International relations
1
331 - Labor economics
1
332 - Financial economics
1
more ...