Classification
300 - Social sciences
320 - Political science
370 - Education
380 - Commerce, communications & transportation
3
400 - Language
3
600 - Technology
620 - Engineering & allied operations
3
900 - History & geography
3
100 - Philosophy & psychology
2
330 - Economics
2
700 - The arts; fine & decorative arts
2
780 - Music
2
000 - Computer science, information & general works
1
333 - Economics of land & energy
1
340 - Law
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
658 - General management
1