Classification
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414 - Phonology & phonetics
1
440 - Romance languages; French
2
500 - Natural sciences & mathematics
121
507 - Education, research & related topics
1
520 - Astronomy & allied sciences
2
530 - Physics
9
540 - Chemistry & allied sciences
41
550 - Earth sciences
3
551 - Geology, hydrology & meteorology
8
570 - Life sciences; biology
2
576 - Genetics & evolution
51
579 - Microorganisms, fungi & algae
1
580 - Plants (Botany)
9
581 - Specific topics in natural history
6
590 - Animals (Zoology)
1
600 - Technology
42
610 - Medicine & health
225
612 - Human physiology
4
613 - Personal health & safety
5
614 - Incidence & prevention of disease
1
615 - Pharmacology & therapeutics
17
616 - Diseases
15
618 - Gynecology, obstetrics, pediatrics & geriatrics
1
620 - Engineering & allied operations
67
621 - Applied physics
3
629 - Other branches of engineering
1
630 - Agriculture & related technologies
13
631 - Techniques, equipment & materials
1
651 - Office services
1
658 - General management
53
660 - Chemical engineering
3
670 - Manufacturing
4
697 - Heating, ventilating & air-conditioning
1
700 - The arts; fine & decorative arts
235
720 - Architecture
29
740 - Drawing & decorative arts
1
745 - Decorative arts
140
770 - Photography, photographs & computer art
4
780 - Music
16
800 - Literature & rhetoric
74
830 - Literatures of Germanic languages
7
891 - East Indo-European & Celtic literatures
1
900 - History & geography
620
947 - Eastern Europe; Russia
1
949 - Other parts of Europe
1
956 - Middle East (Near East)
1