Classification
000 - Computer science, information & general works
1
320 - Political science
330 - Economics
1
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1
551 - Geology, hydrology & meteorology
1
600 - Technology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
900 - History & geography
1