Classification
900 - History & geography
4
700 - The arts; fine & decorative arts
3
330 - Economics
2
333 - Economics of land & energy
2
600 - Technology
2
620 - Engineering & allied operations
2
820 - English & Old English literatures
2
000 - Computer science, information & general works
1
012 - Bibliographies of individuals
1
100 - Philosophy & psychology
1
320 - Political science
1
340 - Law
1
380 - Commerce, communications & transportation
1
580 - Plants (Botany)
1
720 - Architecture
1
800 - Literature & rhetoric
1