Classification
900 - History & geography
3
320 - Political science
2
400 - Language
2
700 - The arts; fine & decorative arts
2
770 - Photography, photographs & computer art
2
000 - Computer science, information & general works
1
200 - Religion
1
380 - Commerce, communications & transportation
1
410 - Linguistics
1
800 - Literature & rhetoric
1