Classification
000 - Computer science, information & general works
600 - Technology
6
380 - Commerce, communications & transportation
4
330 - Economics
2
510 - Mathematics
2
658 - General management
2
900 - History & geography
2
100 - Philosophy & psychology
1
331 - Labor economics
1
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
519 - Probabilities & applied mathematics
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1
780 - Music
1