Classification
414 - Phonology & phonetics
600 - Technology
16
700 - The arts; fine & decorative arts
16
620 - Engineering & allied operations
15
900 - History & geography
14
333 - Economics of land & energy
13
363 - Other social problems & services
9
610 - Medicine & health
9
580 - Plants (Botany)
8
576 - Genetics & evolution
6
000 - Computer science, information & general works
5
140 - Specific philosophical schools
4
304 - Factors affecting social behavior
4
530 - Physics
2
770 - Photography, photographs & computer art
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
170 - Ethics
1
301 - Sociology & anthropology
1
340 - Law
1
370 - Education
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
581 - Specific topics in natural history
1