Classification
900 - History & geography
600 - Technology
52
620 - Engineering & allied operations
51
700 - The arts; fine & decorative arts
39
333 - Economics of land & energy
27
610 - Medicine & health
10
000 - Computer science, information & general works
9
363 - Other social problems & services
9
380 - Commerce, communications & transportation
9
140 - Specific philosophical schools
8
580 - Plants (Botany)
7
800 - Literature & rhetoric
7
530 - Physics
6
330 - Economics
5
551 - Geology, hydrology & meteorology
5
720 - Architecture
5
340 - Law
4
540 - Chemistry & allied sciences
4
576 - Genetics & evolution
4
630 - Agriculture & related technologies
4
170 - Ethics
2
300 - Social sciences
2
320 - Political science
2
370 - Education
2
500 - Natural sciences & mathematics
2
414 - Phonology & phonetics
1
770 - Photography, photographs & computer art
1