Classification
330 - Economics
333 - Economics of land & energy
000 - Computer science, information & general works
2
380 - Commerce, communications & transportation
2
500 - Natural sciences & mathematics
2
900 - History & geography
2
340 - Law
1
363 - Other social problems & services
1
580 - Plants (Botany)
1
600 - Technology
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1