Classification
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
320 - Political science
1
330 - Economics
1
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
600 - Technology
1
620 - Engineering & allied operations
630 - Agriculture & related technologies
700 - The arts; fine & decorative arts