Classification
612 - Human physiology
610 - Medicine & health
3
333 - Economics of land & energy
2
540 - Chemistry & allied sciences
2
580 - Plants (Botany)
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
000 - Computer science, information & general works
1
361 - Social problems & social welfare in general
1
370 - Education
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
600 - Technology
1
615 - Pharmacology & therapeutics
1
620 - Engineering & allied operations
1