Classification
414 - Phonology & phonetics
333 - Economics of land & energy
13
580 - Plants (Botany)
13
700 - The arts; fine & decorative arts
13
620 - Engineering & allied operations
11
000 - Computer science, information & general works
10
610 - Medicine & health
10
600 - Technology
8
140 - Specific philosophical schools
7
363 - Other social problems & services
7
900 - History & geography
7
576 - Genetics & evolution
6
380 - Commerce, communications & transportation
5
612 - Human physiology
5
500 - Natural sciences & mathematics
4
300 - Social sciences
3
540 - Chemistry & allied sciences
3
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
630 - Agriculture & related technologies
2
304 - Factors affecting social behavior
1
530 - Physics
1
720 - Architecture
1
770 - Photography, photographs & computer art
1