Classification
140 - Specific philosophical schools
330 - Economics
363 - Other social problems & services
380 - Commerce, communications & transportation
000 - Computer science, information & general works
20
700 - The arts; fine & decorative arts
19
333 - Economics of land & energy
18
551 - Geology, hydrology & meteorology
14
600 - Technology
14
610 - Medicine & health
14
620 - Engineering & allied operations
10
900 - History & geography
10
320 - Political science
8
370 - Education
8
720 - Architecture
7
576 - Genetics & evolution
6
580 - Plants (Botany)
6
581 - Specific topics in natural history
5
658 - General management
4
340 - Law
3
400 - Language
3
414 - Phonology & phonetics
3
657 - Accounting
3
800 - Literature & rhetoric
3
300 - Social sciences
2
304 - Factors affecting social behavior
2
630 - Agriculture & related technologies
2
160 - Logic
1
170 - Ethics
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1