Classification
140 - Specific philosophical schools
320 - Political science
600 - Technology
700 - The arts; fine & decorative arts
28
330 - Economics
21
333 - Economics of land & energy
21
363 - Other social problems & services
20
620 - Engineering & allied operations
20
000 - Computer science, information & general works
15
380 - Commerce, communications & transportation
15
900 - History & geography
15
300 - Social sciences
10
340 - Law
10
610 - Medicine & health
10
551 - Geology, hydrology & meteorology
9
370 - Education
8
100 - Philosophy & psychology
7
170 - Ethics
7
581 - Specific topics in natural history
7
576 - Genetics & evolution
6
720 - Architecture
6
301 - Sociology & anthropology
5
361 - Social problems & social welfare in general
5
200 - Religion
4
500 - Natural sciences & mathematics
4
800 - Literature & rhetoric
4
304 - Factors affecting social behavior
3
580 - Plants (Botany)
3
630 - Agriculture & related technologies
3
658 - General management
3
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
336 - Public finance
1
364 - Criminology
1
400 - Language
1
530 - Physics
1
540 - Chemistry & allied sciences
1
657 - Accounting
1