Classification
600 - Technology
610 - Medicine & health
700 - The arts; fine & decorative arts
343
620 - Engineering & allied operations
301
900 - History & geography
215
333 - Economics of land & energy
208
000 - Computer science, information & general works
190
363 - Other social problems & services
167
330 - Economics
164
140 - Specific philosophical schools
123
580 - Plants (Botany)
109
304 - Factors affecting social behavior
105
380 - Commerce, communications & transportation
85
630 - Agriculture & related technologies
78
370 - Education
75
320 - Political science
69
576 - Genetics & evolution
41
500 - Natural sciences & mathematics
37
551 - Geology, hydrology & meteorology
37
540 - Chemistry & allied sciences
30
100 - Philosophy & psychology
29
658 - General management
29
720 - Architecture
29
170 - Ethics
28
300 - Social sciences
25
340 - Law
23
615 - Pharmacology & therapeutics
22
400 - Language
21
581 - Specific topics in natural history
21
414 - Phonology & phonetics
20
612 - Human physiology
18
800 - Literature & rhetoric
17
530 - Physics
16
361 - Social problems & social welfare in general
9
410 - Linguistics
9
200 - Religion
5
780 - Music
5
360 - Social problems & services; associations
4
301 - Sociology & anthropology
3
350 - Public administration & military science
3
657 - Accounting
3
120 - Epistemology, causation & humankind
2
364 - Criminology
2
791 - Public performances
2
001 - Knowledge
1
297 - Islam, Babism & Bahai Faith
1
336 - Public finance
1
338 - Production
1
362 - Social welfare problems & services
1
520 - Astronomy & allied sciences
1
more ...