Classification
540 - Chemistry & allied sciences
333 - Economics of land & energy
6
600 - Technology
6
620 - Engineering & allied operations
6
700 - The arts; fine & decorative arts
6
000 - Computer science, information & general works
4
330 - Economics
2
340 - Law
2
414 - Phonology & phonetics
2
530 - Physics
2
900 - History & geography
2
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
720 - Architecture
1