Classification
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720 - Architecture
4
530 - Physics
3
540 - Chemistry & allied sciences
3
305 - Social groups
2
342 - Constitutional & administrative law
2
371 - Schools & their activities; special education
2
400 - Language
2
414 - Phonology & phonetics
2
539 - Modern physics
2
549 - Mineralogy
2
582 - Plants noted for characteristics & flowers
2
615 - Pharmacology & therapeutics
2
650 - Management & auxiliary services
2
770 - Photography, photographs & computer art
2
790 - Recreational & performing arts
2
006 - Special computer methods
1
111 - Ontology
1
327 - International relations
1
336 - Public finance
1
346 - Private law
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
509 - Historical, geographic & persons treatment
1
520 - Astronomy & allied sciences
1
541 - Physical chemistry
1
543 - Analytical chemistry
1
546 - Inorganic chemistry
1
560 - Paleontology; paleozoology
1
613 - Personal health & safety
1
617 - Surgery & related medical specialties
1
632 - Plant injuries, diseases & pests
1
636 - Animal husbandry
1
657 - Accounting
1
668 - Technology of other organic products
1
674 - Lumber processing, wood products & cork
1
677 - Textiles
1
690 - Buildings
1
778 - Fields & kinds of photography
1