Classification
370 - Education
100 - Philosophy & psychology
399
700 - The arts; fine & decorative arts
392
333 - Economics of land & energy
342
900 - History & geography
287
600 - Technology
282
320 - Political science
263
610 - Medicine & health
246
300 - Social sciences
229
140 - Specific philosophical schools
215
330 - Economics
205
400 - Language
196
000 - Computer science, information & general works
171
363 - Other social problems & services
164
380 - Commerce, communications & transportation
162
500 - Natural sciences & mathematics
145
620 - Engineering & allied operations
102
304 - Factors affecting social behavior
85
340 - Law
85
200 - Religion
77
530 - Physics
72
800 - Literature & rhetoric
65
410 - Linguistics
59
170 - Ethics
58
780 - Music
54
551 - Geology, hydrology & meteorology
43
301 - Sociology & anthropology
42
720 - Architecture
36
658 - General management
33
576 - Genetics & evolution
32
297 - Islam, Babism & Bahai Faith
25
580 - Plants (Botany)
24
581 - Specific topics in natural history
22
540 - Chemistry & allied sciences
21
361 - Social problems & social welfare in general
16
630 - Agriculture & related technologies
15
120 - Epistemology, causation & humankind
13
414 - Phonology & phonetics
10
770 - Photography, photographs & computer art
10
791 - Public performances
9
657 - Accounting
8
360 - Social problems & services; associations
7
350 - Public administration & military science
6
612 - Human physiology
6
296 - Judaism
5
615 - Pharmacology & therapeutics
5
364 - Criminology
4
520 - Astronomy & allied sciences
4
160 - Logic
3
336 - Public finance
2
more ...