Classification
580 - Plants (Botany)
600 - Technology
21
700 - The arts; fine & decorative arts
21
620 - Engineering & allied operations
18
333 - Economics of land & energy
12
610 - Medicine & health
12
900 - History & geography
12
363 - Other social problems & services
10
000 - Computer science, information & general works
9
414 - Phonology & phonetics
7
330 - Economics
6
304 - Factors affecting social behavior
4
380 - Commerce, communications & transportation
3
540 - Chemistry & allied sciences
3
576 - Genetics & evolution
3
140 - Specific philosophical schools
2
500 - Natural sciences & mathematics
2
170 - Ethics
1
320 - Political science
1
340 - Law
1
370 - Education
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
658 - General management
1
720 - Architecture
1