Classification
100 - Philosophy & psychology
300 - Social sciences
29
320 - Political science
20
900 - History & geography
7
340 - Law
6
600 - Technology
5
200 - Religion
4
301 - Sociology & anthropology
4
330 - Economics
4
333 - Economics of land & energy
4
620 - Engineering & allied operations
3
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
120 - Epistemology, causation & humankind
2
140 - Specific philosophical schools
2
170 - Ethics
2
370 - Education
2
400 - Language
2
410 - Linguistics
2
610 - Medicine & health
2
296 - Judaism
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
364 - Criminology
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
530 - Physics
1
576 - Genetics & evolution
1
800 - Literature & rhetoric
1