Classification
000 - Computer science, information & general works
300 - Social sciences
320 - Political science
2
330 - Economics
380 - Commerce, communications & transportation
600 - Technology
620 - Engineering & allied operations
2
900 - History & geography
100 - Philosophy & psychology
1
170 - Ethics
1
340 - Law
1
370 - Education
1
400 - Language
1
410 - Linguistics
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1
780 - Music
1