Classification
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490 - Other languages
2
511 - General principles of mathematics
2
515 - Analysis
2
571 - Physiology & related subjects
2
629 - Other branches of engineering
2
670 - Manufacturing
2
700 - The arts; fine & decorative arts
2
745 - Decorative arts
2
109 - Historical & collected persons treatment
1
113 - Cosmology
1
126 - The self
1
146 - Naturalism & related systems
1
170 - Ethics
1
189 - Medieval western philosophy
1
190 - Modern western philosophy
1
202 - Doctrines
1
210 - Philosophy & theory of religion
1
324 - The political process
1
330 - Economics
1
333 - Economics of land & energy
1
338 - Production
1
343 - Military, tax, trade & industrial law
1
344 - Labor, social, education & cultural law
1
372 - Elementary education
1
374 - Adult education
1
378 - Higher education
1
381 - Commerce
1
404 - Special topics
1
417 - Dialectology & historical linguistics
1
430 - Germanic languages; German
1
501 - Philosophy & theory
1
512 - Algebra
1
516 - Geometry
1
535 - Light & infrared & ultraviolet phenomena
1
540 - Chemistry & allied sciences
1
611 - Human anatomy, cytology & histology
1
613 - Personal health & safety
1
614 - Incidence & prevention of disease
1
617 - Surgery & related medical specialties
1
641 - Food & drink
1
664 - Food technology
1
741 - Drawing & drawings
1
781 - General principles & musical forms
1
790 - Recreational & performing arts
1
800 - Literature & rhetoric
1
801 - Philosophy & theory
1
808 - Rhetoric & collections of literature
1
907 - Education, research & related topics
1
909 - World history
1