Classification
000 - Computer science, information & general works
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
2
170 - Ethics
1
300 - Social sciences
1
333 - Economics of land & energy
23
380 - Commerce, communications & transportation
2
500 - Natural sciences & mathematics
1
520 - Astronomy & allied sciences
5
523 - Specific celestial bodies & phenomena
5
530 - Physics
36
539 - Modern physics
230
541 - Physical chemistry
4
550 - Earth sciences
1
571 - Physiology & related subjects
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
600 - Technology
2
601 - Philosophy & theory
1
620 - Engineering & allied operations
3
621 - Applied physics
12
650 - Management & auxiliary services
1
700 - The arts; fine & decorative arts
14
770 - Photography, photographs & computer art
1
800 - Literature & rhetoric
1
900 - History & geography
2