Classification
540 - Chemistry & allied sciences
34
820 - English & Old English literatures
24
330 - Economics
9
010 - Bibliography
8
610 - Medicine & health
7
020 - Library & information sciences
6
320 - Political science
5
370 - Education
4
170 - Ethics
3
301 - Sociology & anthropology
3
500 - Natural sciences & mathematics
3
613 - Personal health & safety
3
616 - Diseases
3
620 - Engineering & allied operations
3
005 - Computer programming, programs & data
2
100 - Philosophy & psychology
2
515 - Analysis
2
520 - Astronomy & allied sciences
2
530 - Physics
2
550 - Earth sciences
2
572 - Biochemistry
2
577 - Ecology
2
617 - Surgery & related medical specialties
2
618 - Gynecology, obstetrics, pediatrics & geriatrics
2
630 - Agriculture & related technologies
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
001 - Knowledge
1
003 - Systems
1
004 - Data processing & computer science
1
006 - Special computer methods
1
030 - General encyclopedic works
1
069 - Museum science
1
140 - Specific philosophical schools
1
210 - Philosophy & theory of religion
1
250 - Christian orders & local church
1
274 - History of Christianity in Europe
1
300 - Social sciences
1
303 - Social processes
1
304 - Factors affecting social behavior
1
324 - The political process
1
332 - Financial economics
1
333 - Economics of land & energy
1
338 - Production
1
340 - Law
1
363 - Other social problems & services
1
390 - Customs, etiquette & folklore
1
510 - Mathematics
1
519 - Probabilities & applied mathematics
1
526 - Mathematical geography
1
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