Classification
333 - Economics of land & energy
89
600 - Technology
64
620 - Engineering & allied operations
50
900 - History & geography
46
700 - The arts; fine & decorative arts
32
380 - Commerce, communications & transportation
20
330 - Economics
15
363 - Other social problems & services
13
000 - Computer science, information & general works
12
580 - Plants (Botany)
7
140 - Specific philosophical schools
6
320 - Political science
5
551 - Geology, hydrology & meteorology
5
414 - Phonology & phonetics
3
530 - Physics
3
576 - Genetics & evolution
3
630 - Agriculture & related technologies
3
300 - Social sciences
2
340 - Law
2
500 - Natural sciences & mathematics
2
610 - Medicine & health
2
800 - Literature & rhetoric
2
350 - Public administration & military science
1
370 - Education
1
550 - Earth sciences
1
612 - Human physiology
1
720 - Architecture
1