Classification
140 - Specific philosophical schools
340 - Law
540 - Chemistry & allied sciences
600 - Technology
2
610 - Medicine & health
700 - The arts; fine & decorative arts
304 - Factors affecting social behavior
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
400 - Language
1
580 - Plants (Botany)
1
620 - Engineering & allied operations
1