Classification
320 - Political science
900 - History & geography
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
170 - Ethics
1
300 - Social sciences
1
330 - Economics
1
340 - Law
1
370 - Education
1
500 - Natural sciences & mathematics
1
581 - Specific topics in natural history
1
600 - Technology
1