Classification
363 - Other social problems & services
600 - Technology
176
333 - Economics of land & energy
174
700 - The arts; fine & decorative arts
165
330 - Economics
161
551 - Geology, hydrology & meteorology
134
000 - Computer science, information & general works
132
610 - Medicine & health
122
620 - Engineering & allied operations
120
320 - Political science
113
900 - History & geography
100
140 - Specific philosophical schools
80
380 - Commerce, communications & transportation
71
581 - Specific topics in natural history
64
370 - Education
61
630 - Agriculture & related technologies
53
580 - Plants (Botany)
50
500 - Natural sciences & mathematics
43
576 - Genetics & evolution
40
300 - Social sciences
34
304 - Factors affecting social behavior
30
800 - Literature & rhetoric
29
628 - Sanitary & municipal engineering
28
658 - General management
28
540 - Chemistry & allied sciences
26
720 - Architecture
26
100 - Philosophy & psychology
23
301 - Sociology & anthropology
23
340 - Law
22
364 - Criminology
15
414 - Phonology & phonetics
15
400 - Language
13
170 - Ethics
12
612 - Human physiology
12
200 - Religion
9
530 - Physics
9
410 - Linguistics
7
297 - Islam, Babism & Bahai Faith
6
331 - Labor economics
6
361 - Social problems & social welfare in general
6
120 - Epistemology, causation & humankind
5
780 - Music
4
590 - Animals (Zoology)
3
338 - Production
2
344 - Labor, social, education & cultural law
2
615 - Pharmacology & therapeutics
2
657 - Accounting
2
160 - Logic
1
302 - Social interaction
1
303 - Social processes
1
more ...