Classification
333 - Economics of land & energy
370 - Education
800 - Literature & rhetoric
900 - History & geography
5
000 - Computer science, information & general works
3
363 - Other social problems & services
3
400 - Language
3
700 - The arts; fine & decorative arts
3
100 - Philosophy & psychology
2
500 - Natural sciences & mathematics
2
530 - Physics
2
600 - Technology
2
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
200 - Religion
1
330 - Economics
1
410 - Linguistics
1
520 - Astronomy & allied sciences
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
770 - Photography, photographs & computer art
1