Classification
320 - Political science
340 - Law
500 - Natural sciences & mathematics
700 - The arts; fine & decorative arts
900 - History & geography
140 - Specific philosophical schools
3
363 - Other social problems & services
3
380 - Commerce, communications & transportation
3
576 - Genetics & evolution
3
600 - Technology
3
620 - Engineering & allied operations
3
720 - Architecture
3
330 - Economics
1
370 - Education
1