Classification
000 - Computer science, information & general works
300 - Social sciences
900 - History & geography
320 - Political science
23
330 - Economics
14
700 - The arts; fine & decorative arts
12
100 - Philosophy & psychology
9
333 - Economics of land & energy
9
380 - Commerce, communications & transportation
9
600 - Technology
8
200 - Religion
7
363 - Other social problems & services
7
410 - Linguistics
7
620 - Engineering & allied operations
7
800 - Literature & rhetoric
7
301 - Sociology & anthropology
6
400 - Language
6
140 - Specific philosophical schools
5
610 - Medicine & health
5
630 - Agriculture & related technologies
5
304 - Factors affecting social behavior
3
340 - Law
3
370 - Education
3
576 - Genetics & evolution
3
530 - Physics
2
581 - Specific topics in natural history
2
720 - Architecture
2
780 - Music
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
398 - Folklore
1
520 - Astronomy & allied sciences
1
580 - Plants (Botany)
1
770 - Photography, photographs & computer art
1