Classification
000 - Computer science, information & general works
330 - Economics
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
400 - Language
600 - Technology
2
700 - The arts; fine & decorative arts
2
320 - Political science
1
380 - Commerce, communications & transportation
1
410 - Linguistics
1
620 - Engineering & allied operations
1
900 - History & geography
1