Classification
100 - Philosophy & psychology
320 - Political science
330 - Economics
380 - Commerce, communications & transportation
658 - General management
170 - Ethics
1
300 - Social sciences
1
340 - Law
1
363 - Other social problems & services
1
370 - Education
1
400 - Language
1
551 - Geology, hydrology & meteorology
1
600 - Technology
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1
780 - Music
1
900 - History & geography
1