Classification
900 - History & geography
25
700 - The arts; fine & decorative arts
20
000 - Computer science, information & general works
13
600 - Technology
12
300 - Social sciences
6
370 - Education
6
320 - Political science
5
140 - Specific philosophical schools
4
340 - Law
4
380 - Commerce, communications & transportation
4
780 - Music
4
100 - Philosophy & psychology
3
200 - Religion
3
330 - Economics
3
333 - Economics of land & energy
2
610 - Medicine & health
2
620 - Engineering & allied operations
2
120 - Epistemology, causation & humankind
1
301 - Sociology & anthropology
1
363 - Other social problems & services
1
398 - Folklore
1
400 - Language
1
410 - Linguistics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
650 - Management & auxiliary services
1
657 - Accounting
1
720 - Architecture
1
770 - Photography, photographs & computer art
1
800 - Literature & rhetoric
1