Classification
330 - Economics
17
320 - Political science
7
340 - Law
6
005 - Computer programming, programs & data
3
378 - Higher education
3
001 - Knowledge
2
006 - Special computer methods
2
300 - Social sciences
2
331 - Labor economics
2
338 - Production
2
520 - Astronomy & allied sciences
2
630 - Agriculture & related technologies
2
900 - History & geography
2
158 - Applied psychology
1
170 - Ethics
1
250 - Christian orders & local church
1
301 - Sociology & anthropology
1
302 - Social interaction
1
327 - International relations
1
363 - Other social problems & services
1
370 - Education
1
500 - Natural sciences & mathematics
1
510 - Mathematics
1
523 - Specific celestial bodies & phenomena
1
526 - Mathematical geography
1
537 - Electricity & electronics
1
550 - Earth sciences
1
610 - Medicine & health
1
617 - Surgery & related medical specialties
1
618 - Gynecology, obstetrics, pediatrics & geriatrics
1
621 - Applied physics
1
641 - Food & drink
1
664 - Food technology
1
710 - Civic & landscape art
1
930 - History of ancient world to ca. 499
1