Classification
500 - Natural sciences & mathematics
005 - Computer programming, programs & data
21
006 - Special computer methods
10
658 - General management
4
330 - Economics
3
900 - History & geography
3
300 - Social sciences
2
338 - Production
2
000 - Computer science, information & general works
1
004 - Data processing & computer science
1
140 - Specific philosophical schools
1
301 - Sociology & anthropology
1
302 - Social interaction
1
331 - Labor economics
1
371 - Schools & their activities; special education
1
510 - Mathematics
1
511 - General principles of mathematics
1
590 - Animals (Zoology)
1
610 - Medicine & health
1
650 - Management & auxiliary services
1
670 - Manufacturing
1