Classification
576 - Genetics & evolution
363 - Other social problems & services
20
700 - The arts; fine & decorative arts
14
380 - Commerce, communications & transportation
12
600 - Technology
12
000 - Computer science, information & general works
11
333 - Economics of land & energy
11
610 - Medicine & health
8
620 - Engineering & allied operations
8
330 - Economics
7
900 - History & geography
7
320 - Political science
6
500 - Natural sciences & mathematics
6
551 - Geology, hydrology & meteorology
6
140 - Specific philosophical schools
5
580 - Plants (Botany)
5
304 - Factors affecting social behavior
4
658 - General management
4
370 - Education
3
581 - Specific topics in natural history
3
340 - Law
2
540 - Chemistry & allied sciences
2
170 - Ethics
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
400 - Language
1
410 - Linguistics
1
530 - Physics
1
630 - Agriculture & related technologies
1
720 - Architecture
1
800 - Literature & rhetoric
1