Classification
320 - Political science
330 - Economics
380 - Commerce, communications & transportation
551 - Geology, hydrology & meteorology
620 - Engineering & allied operations
000 - Computer science, information & general works
2
333 - Economics of land & energy
2
600 - Technology
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
170 - Ethics
1
340 - Law
1
414 - Phonology & phonetics
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
610 - Medicine & health
1