Classification
330 - Economics
2
600 - Technology
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
333 - Economics of land & energy
1
340 - Law
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
900 - History & geography
1