Classification
380 - Commerce, communications & transportation
540 - Chemistry & allied sciences
580 - Plants (Botany)
000 - Computer science, information & general works
1
363 - Other social problems & services
1
600 - Technology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1