Classification
363 - Other social problems & services
500 - Natural sciences & mathematics
600 - Technology
620 - Engineering & allied operations
3
630 - Agriculture & related technologies
700 - The arts; fine & decorative arts
551 - Geology, hydrology & meteorology
2
000 - Computer science, information & general works
1
300 - Social sciences
1
320 - Political science
1
333 - Economics of land & energy
1
340 - Law
1
370 - Education
1
380 - Commerce, communications & transportation
1
530 - Physics
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
900 - History & geography
1