Classification
000 - Computer science, information & general works
320 - Political science
900 - History & geography
700 - The arts; fine & decorative arts
42
330 - Economics
26
333 - Economics of land & energy
26
600 - Technology
23
363 - Other social problems & services
22
380 - Commerce, communications & transportation
22
300 - Social sciences
21
620 - Engineering & allied operations
20
100 - Philosophy & psychology
15
200 - Religion
13
140 - Specific philosophical schools
9
370 - Education
9
400 - Language
9
610 - Medicine & health
9
551 - Geology, hydrology & meteorology
8
301 - Sociology & anthropology
7
581 - Specific topics in natural history
7
720 - Architecture
7
800 - Literature & rhetoric
7
410 - Linguistics
5
630 - Agriculture & related technologies
5
297 - Islam, Babism & Bahai Faith
4
340 - Law
4
576 - Genetics & evolution
4
530 - Physics
3
580 - Plants (Botany)
3
658 - General management
3
120 - Epistemology, causation & humankind
2
170 - Ethics
2
304 - Factors affecting social behavior
2
780 - Music
2
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
414 - Phonology & phonetics
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1
770 - Photography, photographs & computer art
1