Classification
304 - Factors affecting social behavior
610 - Medicine & health
358
330 - Economics
145
320 - Political science
131
333 - Economics of land & energy
85
300 - Social sciences
49
900 - History & geography
46
370 - Education
43
363 - Other social problems & services
28
140 - Specific philosophical schools
25
700 - The arts; fine & decorative arts
25
600 - Technology
23
301 - Sociology & anthropology
20
340 - Law
18
800 - Literature & rhetoric
16
380 - Commerce, communications & transportation
15
200 - Religion
14
630 - Agriculture & related technologies
14
000 - Computer science, information & general works
11
100 - Philosophy & psychology
9
400 - Language
9
297 - Islam, Babism & Bahai Faith
8
576 - Genetics & evolution
8
338 - Production
7
500 - Natural sciences & mathematics
5
581 - Specific topics in natural history
5
620 - Engineering & allied operations
5
658 - General management
5
350 - Public administration & military science
4
361 - Social problems & social welfare in general
4
780 - Music
4
331 - Labor economics
3
551 - Geology, hydrology & meteorology
3
170 - Ethics
2
336 - Public finance
2
398 - Folklore
2
410 - Linguistics
2
580 - Plants (Botany)
2
770 - Photography, photographs & computer art
2
920 - Biography, genealogy & insignia
2
296 - Judaism
1
307 - Communities
1
341 - Law of nations
1
360 - Social problems & services; associations
1
364 - Criminology
1
381 - Commerce
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
634 - Orchards, fruits & forestry
1
943 - Central Europe; Germany
1