Classification
100 - Philosophy & psychology
120 - Epistemology, causation & humankind
170 - Ethics
16
900 - History & geography
16
700 - The arts; fine & decorative arts
15
530 - Physics
13
320 - Political science
11
140 - Specific philosophical schools
9
400 - Language
9
340 - Law
7
200 - Religion
6
370 - Education
6
600 - Technology
5
000 - Computer science, information & general works
4
500 - Natural sciences & mathematics
4
300 - Social sciences
3
333 - Economics of land & energy
3
380 - Commerce, communications & transportation
3
576 - Genetics & evolution
3
520 - Astronomy & allied sciences
2
610 - Medicine & health
2
800 - Literature & rhetoric
2
920 - Biography, genealogy & insignia
2
160 - Logic
1
301 - Sociology & anthropology
1
330 - Economics
1
410 - Linguistics
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
770 - Photography, photographs & computer art
1