Classification
300 - Social sciences
320 - Political science
3
330 - Economics
340 - Law
000 - Computer science, information & general works
1
170 - Ethics
1
361 - Social problems & social welfare in general
1
380 - Commerce, communications & transportation
1
600 - Technology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
650 - Management & auxiliary services
1
658 - General management
1
900 - History & geography
1