Classification
530 - Physics
000 - Computer science, information & general works
32
700 - The arts; fine & decorative arts
28
333 - Economics of land & energy
25
600 - Technology
15
620 - Engineering & allied operations
12
380 - Commerce, communications & transportation
10
900 - History & geography
9
363 - Other social problems & services
8
330 - Economics
6
576 - Genetics & evolution
6
140 - Specific philosophical schools
5
540 - Chemistry & allied sciences
5
551 - Geology, hydrology & meteorology
5
580 - Plants (Botany)
5
500 - Natural sciences & mathematics
4
370 - Education
3
100 - Philosophy & psychology
2
340 - Law
2
610 - Medicine & health
2
720 - Architecture
2
800 - Literature & rhetoric
2
200 - Religion
1
304 - Factors affecting social behavior
1
400 - Language
1
414 - Phonology & phonetics
1
520 - Astronomy & allied sciences
1
780 - Music
1