Classification
100 - Philosophy & psychology
370 - Education
300 - Social sciences
151
700 - The arts; fine & decorative arts
99
900 - History & geography
84
320 - Political science
69
333 - Economics of land & energy
69
140 - Specific philosophical schools
50
610 - Medicine & health
47
600 - Technology
46
400 - Language
41
380 - Commerce, communications & transportation
34
170 - Ethics
33
500 - Natural sciences & mathematics
32
000 - Computer science, information & general works
28
330 - Economics
28
200 - Religion
25
301 - Sociology & anthropology
22
363 - Other social problems & services
21
780 - Music
21
340 - Law
20
800 - Literature & rhetoric
19
304 - Factors affecting social behavior
18
410 - Linguistics
18
620 - Engineering & allied operations
17
530 - Physics
12
576 - Genetics & evolution
9
120 - Epistemology, causation & humankind
7
361 - Social problems & social welfare in general
6
770 - Photography, photographs & computer art
6
360 - Social problems & services; associations
4
364 - Criminology
4
540 - Chemistry & allied sciences
4
581 - Specific topics in natural history
4
658 - General management
4
297 - Islam, Babism & Bahai Faith
3
580 - Plants (Botany)
3
720 - Architecture
3
296 - Judaism
2
551 - Geology, hydrology & meteorology
2
612 - Human physiology
2
630 - Agriculture & related technologies
2
657 - Accounting
2
791 - Public performances
2
160 - Logic
1
248 - Christian experience, practice & life
1
398 - Folklore
1
414 - Phonology & phonetics
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1
more ...