Classification
530 - Physics
000 - Computer science, information & general works
39
333 - Economics of land & energy
19
620 - Engineering & allied operations
19
700 - The arts; fine & decorative arts
19
600 - Technology
9
540 - Chemistry & allied sciences
8
380 - Commerce, communications & transportation
7
580 - Plants (Botany)
7
140 - Specific philosophical schools
5
340 - Law
5
500 - Natural sciences & mathematics
5
363 - Other social problems & services
4
900 - History & geography
4
520 - Astronomy & allied sciences
3
576 - Genetics & evolution
3
610 - Medicine & health
3
800 - Literature & rhetoric
3
630 - Agriculture & related technologies
2
304 - Factors affecting social behavior
1
330 - Economics
1
370 - Education
1
400 - Language
1
581 - Specific topics in natural history
1
780 - Music
1