Classification
330 - Economics
834
820 - English & Old English literatures
78
700 - The arts; fine & decorative arts
74
000 - Computer science, information & general works
59
900 - History & geography
51
600 - Technology
44
610 - Medicine & health
43
320 - Political science
38
620 - Engineering & allied operations
31
333 - Economics of land & energy
30
340 - Law
30
363 - Other social problems & services
29
364 - Criminology
24
770 - Photography, photographs & computer art
22
580 - Plants (Botany)
19
140 - Specific philosophical schools
18
300 - Social sciences
17
280 - Christian denominations & sects
16
540 - Chemistry & allied sciences
16
576 - Genetics & evolution
15
380 - Commerce, communications & transportation
13
800 - Literature & rhetoric
13
551 - Geology, hydrology & meteorology
11
581 - Specific topics in natural history
11
301 - Sociology & anthropology
9
414 - Phonology & phonetics
9
500 - Natural sciences & mathematics
9
658 - General management
9
778 - Fields & kinds of photography
9
100 - Philosophy & psychology
7
346 - Private law
7
170 - Ethics
6
305 - Social groups
6
370 - Education
6
530 - Physics
6
630 - Agriculture & related technologies
6
970 - History of North America
6
302 - Social interaction
5
304 - Factors affecting social behavior
5
360 - Social problems & services; associations
5
361 - Social problems & social welfare in general
5
200 - Religion
4
240 - Christian moral & devotional theology
4
297 - Islam, Babism & Bahai Faith
4
612 - Human physiology
4
720 - Architecture
4
780 - Music
4
973 - United States
4
260 - Social & ecclesiastical theology
3
331 - Labor economics
3
more ...