Classification
576 - Genetics & evolution
800 - Literature & rhetoric
700 - The arts; fine & decorative arts
24
900 - History & geography
20
600 - Technology
18
333 - Economics of land & energy
17
000 - Computer science, information & general works
14
363 - Other social problems & services
14
620 - Engineering & allied operations
14
330 - Economics
13
380 - Commerce, communications & transportation
12
320 - Political science
7
610 - Medicine & health
6
304 - Factors affecting social behavior
4
340 - Law
4
540 - Chemistry & allied sciences
4
720 - Architecture
4
140 - Specific philosophical schools
3
410 - Linguistics
3
580 - Plants (Botany)
3
658 - General management
3
170 - Ethics
2
300 - Social sciences
2
414 - Phonology & phonetics
2
500 - Natural sciences & mathematics
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
791 - Public performances
2
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
370 - Education
1
530 - Physics
1
780 - Music
1