Classification
720 - Architecture
700 - The arts; fine & decorative arts
42
900 - History & geography
38
320 - Political science
15
620 - Engineering & allied operations
15
140 - Specific philosophical schools
12
363 - Other social problems & services
12
300 - Social sciences
9
333 - Economics of land & energy
9
500 - Natural sciences & mathematics
9
800 - Literature & rhetoric
6
000 - Computer science, information & general works
5
200 - Religion
4
330 - Economics
4
400 - Language
4
770 - Photography, photographs & computer art
4
340 - Law
3
380 - Commerce, communications & transportation
3
540 - Chemistry & allied sciences
3
551 - Geology, hydrology & meteorology
3
590 - Animals (Zoology)
3
100 - Philosophy & psychology
2
297 - Islam, Babism & Bahai Faith
2
301 - Sociology & anthropology
2
370 - Education
2
410 - Linguistics
2
600 - Technology
2
364 - Criminology
1
414 - Phonology & phonetics
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
780 - Music
1