Classification
900 - History & geography
320 - Political science
28
800 - Literature & rhetoric
23
200 - Religion
12
100 - Philosophy & psychology
9
300 - Social sciences
9
700 - The arts; fine & decorative arts
9
304 - Factors affecting social behavior
7
330 - Economics
7
340 - Law
7
301 - Sociology & anthropology
6
370 - Education
6
140 - Specific philosophical schools
5
380 - Commerce, communications & transportation
5
576 - Genetics & evolution
5
170 - Ethics
4
363 - Other social problems & services
3
600 - Technology
3
810 - American literature in English
3
813 - American fiction in English
3
333 - Economics of land & energy
2
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
770 - Photography, photographs & computer art
2
940 - History of Europe
2
973 - United States
2
070 - News media, journalism & publishing
1
150 - Psychology
1
296 - Judaism
1
306 - Culture & institutions
1
324 - The political process
1
331 - Labor economics
1
338 - Production
1
346 - Private law
1
361 - Social problems & social welfare in general
1
384 - Communications; telecommunication
1
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
551 - Geology, hydrology & meteorology
1
791 - Public performances
1
811 - American poetry in English
1
820 - English & Old English literatures
1
823 - English fiction
1
913 - Geography of & travel in ancient world
1