Classification
380 - Commerce, communications & transportation
500 - Natural sciences & mathematics
600 - Technology
610 - Medicine & health
620 - Engineering & allied operations
5
900 - History & geography
333 - Economics of land & energy
4
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
576 - Genetics & evolution
2
700 - The arts; fine & decorative arts
2
300 - Social sciences
1
320 - Political science
1
330 - Economics
1
340 - Law
1
370 - Education
1
400 - Language
1
410 - Linguistics
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1