Classification
500 - Natural sciences & mathematics
333 - Economics of land & energy
12
000 - Computer science, information & general works
9
620 - Engineering & allied operations
9
600 - Technology
8
576 - Genetics & evolution
7
700 - The arts; fine & decorative arts
7
530 - Physics
6
540 - Chemistry & allied sciences
6
363 - Other social problems & services
3
621 - Applied physics
3
900 - History & geography
3
330 - Economics
2
340 - Law
2
400 - Language
2
536 - Heat
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
170 - Ethics
1
320 - Political science
1
380 - Commerce, communications & transportation
1
410 - Linguistics
1
510 - Mathematics
1
520 - Astronomy & allied sciences
1
531 - Classical mechanics; solid mechanics
1