Classification
140 - Specific philosophical schools
500 - Natural sciences & mathematics
600 - Technology
330 - Economics
2
380 - Commerce, communications & transportation
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
658 - General management
1
900 - History & geography
1