Classification
610 - Medicine & health
900 - History & geography
600 - Technology
215
620 - Engineering & allied operations
190
700 - The arts; fine & decorative arts
155
333 - Economics of land & energy
116
363 - Other social problems & services
71
140 - Specific philosophical schools
69
330 - Economics
63
000 - Computer science, information & general works
55
380 - Commerce, communications & transportation
44
580 - Plants (Botany)
43
100 - Philosophy & psychology
41
320 - Political science
36
370 - Education
27
800 - Literature & rhetoric
25
300 - Social sciences
24
576 - Genetics & evolution
22
720 - Architecture
21
630 - Agriculture & related technologies
18
200 - Religion
17
551 - Geology, hydrology & meteorology
17
340 - Law
14
170 - Ethics
13
500 - Natural sciences & mathematics
13
414 - Phonology & phonetics
12
581 - Specific topics in natural history
11
540 - Chemistry & allied sciences
9
301 - Sociology & anthropology
8
361 - Social problems & social welfare in general
8
400 - Language
8
530 - Physics
8
658 - General management
8
780 - Music
8
304 - Factors affecting social behavior
7
615 - Pharmacology & therapeutics
7
612 - Human physiology
6
410 - Linguistics
5
120 - Epistemology, causation & humankind
3
297 - Islam, Babism & Bahai Faith
3
350 - Public administration & military science
3
362 - Social welfare problems & services
3
398 - Folklore
3
616 - Diseases
3
791 - Public performances
3
360 - Social problems & services; associations
2
550 - Earth sciences
2
614 - Incidence & prevention of disease
2
657 - Accounting
2
770 - Photography, photographs & computer art
2
more ...