Classification
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150 - Psychology
29
540 - Chemistry & allied sciences
29
570 - Life sciences; biology
28
618 - Gynecology, obstetrics, pediatrics & geriatrics
28
100 - Philosophy & psychology
27
010 - Bibliography
25
418 - Standard usage & applied linguistics
24
650 - Management & auxiliary services
24
615 - Pharmacology & therapeutics
22
210 - Philosophy & theory of religion
21
572 - Biochemistry
21
970 - History of North America
21
580 - Plants (Botany)
20
600 - Technology
20
629 - Other branches of engineering
20
364 - Criminology
19
390 - Customs, etiquette & folklore
18
303 - Social processes
17
361 - Social problems & social welfare in general
17
363 - Other social problems & services
17
470 - Italic languages; Latin
16
515 - Analysis
16
550 - Earth sciences
16
640 - Home & family management
16
003 - Systems
15
220 - Bible
15
155 - Differential & developmental psychology
14
290 - Other religions
14
810 - American literature in English
14
910 - Geography & travel
14
158 - Applied psychology
13
420 - English & Old English
13
660 - Chemical engineering
13
920 - Biography, genealogy & insignia
13
020 - Library & information sciences
12
480 - Hellenic languages; classical Greek
12
576 - Genetics & evolution
12
590 - Animals (Zoology)
12
613 - Personal health & safety
12
120 - Epistemology, causation & humankind
11
140 - Specific philosophical schools
11
490 - Other languages
11
870 - Italic literatures; Latin literature
11
296 - Judaism
10
322 - Relation of state to organized groups
10
323 - Civil & political rights
10
324 - The political process
10
381 - Commerce
10
400 - Language
10
614 - Incidence & prevention of disease
10
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