max xref subjects ddc maybe – least unique to most unique

max xref subjects ddc maybe – least unique to most unique
519: Probabilities & applied mathematics
500: Natural sciences & mathematics
001: Knowledge
100: Philosophy & psychology
300: Social sciences
000: Computer science, information & general works
150: Psychology
510: Mathematics
005: Computer programming, programs & data
520: Astronomy & allied sciences
511: General principles of mathematics
190: Modern western philosophy
004: Data processing & computer science
515: Analysis
530: Physics
160: Logic
003: Systems
006: Special computer methods
330: Economics
531: Classical mechanics; solid mechanics
550: Earth sciences
333: Economics of land & energy
501: Philosophy & theory
200: Religion
320: Political science

 

—– these are most unique or not done —-
020: Library & information sciences
022: Administration of physical plant
025: Library operations
027: General libraries
120: Epistemology, causation & humankind
306: Culture & institutions
310: Collections of general statistics
331: Labor economics
332: Financial economics
336: Public finance
337: International economics
338: Production
339: Macroeconomics & related topics
340: Law
360: Social problems & services; associations
370: Education
381: Commerce
400: Language
410: Linguistics
430: Germanic languages; German
512: Algebra
514: Topology
516: Geometry
518: Numerical analysis
532: Fluid mechanics; liquid mechanics
535: Light & infrared & ultraviolet phenomena
539: Modern physics
540: Chemistry & allied sciences
541: Physical chemistry

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