Classification
100 - Philosophy & psychology
300 - Social sciences
900 - History & geography
320 - Political science
40
200 - Religion
25
700 - The arts; fine & decorative arts
23
330 - Economics
22
301 - Sociology & anthropology
21
600 - Technology
21
370 - Education
15
620 - Engineering & allied operations
12
340 - Law
11
400 - Language
11
576 - Genetics & evolution
10
610 - Medicine & health
10
780 - Music
10
000 - Computer science, information & general works
9
140 - Specific philosophical schools
9
333 - Economics of land & energy
9
410 - Linguistics
9
800 - Literature & rhetoric
9
530 - Physics
8
170 - Ethics
7
297 - Islam, Babism & Bahai Faith
7
500 - Natural sciences & mathematics
5
120 - Epistemology, causation & humankind
4
363 - Other social problems & services
4
380 - Commerce, communications & transportation
4
630 - Agriculture & related technologies
4
720 - Architecture
4
304 - Factors affecting social behavior
3
581 - Specific topics in natural history
3
658 - General management
3
770 - Photography, photographs & computer art
3
296 - Judaism
2
160 - Logic
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
520 - Astronomy & allied sciences
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
580 - Plants (Botany)
1
791 - Public performances
1