Classification
000 - Computer science, information & general works
300 - Social sciences
330 - Economics
380 - Commerce, communications & transportation
600 - Technology
320 - Political science
2
370 - Education
2
170 - Ethics
1
340 - Law
1
363 - Other social problems & services
1
400 - Language
1
500 - Natural sciences & mathematics
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
900 - History & geography
1