Classification
000 - Computer science, information & general works
2
140 - Specific philosophical schools
1
330 - Economics
1
363 - Other social problems & services
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
2
551 - Geology, hydrology & meteorology
3
580 - Plants (Botany)
2
600 - Technology
1
610 - Medicine & health
2
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
2
700 - The arts; fine & decorative arts
800 - Literature & rhetoric
2
900 - History & geography
1