Classification
100 - Philosophy & psychology
700 - The arts; fine & decorative arts
300 - Social sciences
20
600 - Technology
16
320 - Political science
14
000 - Computer science, information & general works
13
900 - History & geography
13
330 - Economics
12
370 - Education
12
400 - Language
9
780 - Music
7
200 - Religion
6
333 - Economics of land & energy
6
140 - Specific philosophical schools
5
170 - Ethics
5
380 - Commerce, communications & transportation
5
410 - Linguistics
5
620 - Engineering & allied operations
5
301 - Sociology & anthropology
4
340 - Law
4
363 - Other social problems & services
4
576 - Genetics & evolution
4
610 - Medicine & health
4
658 - General management
4
500 - Natural sciences & mathematics
3
630 - Agriculture & related technologies
3
720 - Architecture
3
770 - Photography, photographs & computer art
3
800 - Literature & rhetoric
3
120 - Epistemology, causation & humankind
2
530 - Physics
2
297 - Islam, Babism & Bahai Faith
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
791 - Public performances
1