Classification
530 - Physics
700 - The arts; fine & decorative arts
20
000 - Computer science, information & general works
16
333 - Economics of land & energy
12
620 - Engineering & allied operations
7
380 - Commerce, communications & transportation
5
550 - Earth sciences
5
600 - Technology
5
340 - Law
4
500 - Natural sciences & mathematics
4
551 - Geology, hydrology & meteorology
4
320 - Political science
3
520 - Astronomy & allied sciences
3
540 - Chemistry & allied sciences
3
576 - Genetics & evolution
3
900 - History & geography
3
304 - Factors affecting social behavior
2
330 - Economics
2
363 - Other social problems & services
2
414 - Phonology & phonetics
2
580 - Plants (Botany)
2
006 - Special computer methods
1
140 - Specific philosophical schools
1
400 - Language
1
523 - Specific celestial bodies & phenomena
1
610 - Medicine & health
1