Classification
500 - Natural sciences & mathematics
331 - Labor economics
3
000 - Computer science, information & general works
2
330 - Economics
2
658 - General management
2
001 - Knowledge
1
004 - Data processing & computer science
1
303 - Social processes
1
363 - Other social problems & services
1
384 - Communications; telecommunication
1
400 - Language
1
576 - Genetics & evolution
1
745 - Decorative arts
1