Classification
610 - Medicine & health
000 - Computer science, information & general works
504
600 - Technology
456
700 - The arts; fine & decorative arts
446
330 - Economics
331
333 - Economics of land & energy
311
363 - Other social problems & services
297
500 - Natural sciences & mathematics
258
140 - Specific philosophical schools
253
580 - Plants (Botany)
250
620 - Engineering & allied operations
215
370 - Education
213
900 - History & geography
212
380 - Commerce, communications & transportation
202
304 - Factors affecting social behavior
185
300 - Social sciences
170
320 - Political science
154
100 - Philosophy & psychology
125
630 - Agriculture & related technologies
125
540 - Chemistry & allied sciences
95
576 - Genetics & evolution
89
612 - Human physiology
73
551 - Geology, hydrology & meteorology
72
306 - Culture & institutions
68
581 - Specific topics in natural history
66
170 - Ethics
63
615 - Pharmacology & therapeutics
57
340 - Law
53
361 - Social problems & social welfare in general
52
658 - General management
44
800 - Literature & rhetoric
44
301 - Sociology & anthropology
40
400 - Language
29
362 - Social welfare problems & services
26
414 - Phonology & phonetics
26
720 - Architecture
26
200 - Religion
21
530 - Physics
20
616 - Diseases
17
590 - Animals (Zoology)
14
410 - Linguistics
12
613 - Personal health & safety
8
297 - Islam, Babism & Bahai Faith
7
360 - Social problems & services; associations
6
519 - Probabilities & applied mathematics
6
520 - Astronomy & allied sciences
6
618 - Gynecology, obstetrics, pediatrics & geriatrics
6
780 - Music
6
120 - Epistemology, causation & humankind
5
305 - Social groups
5
more ...