Classification
320 - Political science
8
340 - Law
7
327 - International relations
6
005 - Computer programming, programs & data
5
330 - Economics
3
332 - Financial economics
3
363 - Other social problems & services
3
370 - Education
3
610 - Medicine & health
3
616 - Diseases
3
301 - Sociology & anthropology
2
333 - Economics of land & energy
2
338 - Production
2
500 - Natural sciences & mathematics
2
510 - Mathematics
2
539 - Modern physics
2
615 - Pharmacology & therapeutics
2
628 - Sanitary & municipal engineering
2
658 - General management
2
000 - Computer science, information & general works
1
003 - Systems
1
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
158 - Applied psychology
1
174 - Occupational ethics
1
179 - Other ethical norms
1
296 - Judaism
1
297 - Islam, Babism & Bahai Faith
1
305 - Social groups
1
306 - Culture & institutions
1
324 - The political process
1
328 - The legislative process
1
331 - Labor economics
1
337 - International economics
1
339 - Macroeconomics & related topics
1
341 - Law of nations
1
378 - Higher education
1
380 - Commerce, communications & transportation
1
418 - Standard usage & applied linguistics
1
519 - Probabilities & applied mathematics
1
530 - Physics
1
541 - Physical chemistry
1
551 - Geology, hydrology & meteorology
1
572 - Biochemistry
1
618 - Gynecology, obstetrics, pediatrics & geriatrics
1
620 - Engineering & allied operations
1
621 - Applied physics
1
660 - Chemical engineering
1
809 - History, description & criticism
1
930 - History of ancient world to ca. 499
1
more ...