Classification
620 - Engineering & allied operations
530 - Physics
3
000 - Computer science, information & general works
2
333 - Economics of land & energy
2
500 - Natural sciences & mathematics
2
600 - Technology
2
900 - History & geography
2
005 - Computer programming, programs & data
1
140 - Specific philosophical schools
1
330 - Economics
1
363 - Other social problems & services
1
370 - Education
1
520 - Astronomy & allied sciences
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1