Classification
300 - Social sciences
46
616 - Diseases
46
650 - Management & auxiliary services
42
621 - Applied physics
27
658 - General management
21
006 - Special computer methods
20
617 - Surgery & related medical specialties
19
005 - Computer programming, programs & data
16
330 - Economics
16
001 - Knowledge
15
571 - Physiology & related subjects
15
610 - Medicine & health
15
620 - Engineering & allied operations
15
301 - Sociology & anthropology
14
004 - Data processing & computer science
12
618 - Gynecology, obstetrics, pediatrics & geriatrics
12
900 - History & geography
12
636 - Animal husbandry
11
338 - Production
10
670 - Manufacturing
10
190 - Modern western philosophy
9
501 - Philosophy & theory
9
515 - Analysis
9
530 - Physics
8
630 - Agriculture & related technologies
8
320 - Political science
7
572 - Biochemistry
7
612 - Human physiology
7
615 - Pharmacology & therapeutics
7
510 - Mathematics
6
518 - Numerical analysis
6
003 - Systems
5
142 - Critical philosophy
5
150 - Psychology
5
410 - Linguistics
5
519 - Probabilities & applied mathematics
5
579 - Microorganisms, fungi & algae
5
641 - Food & drink
5
664 - Food technology
5
100 - Philosophy & psychology
4
340 - Law
4
520 - Astronomy & allied sciences
4
540 - Chemistry & allied sciences
4
547 - Organic chemistry
4
590 - Animals (Zoology)
4
595 - Arthropods
4
614 - Incidence & prevention of disease
4
629 - Other branches of engineering
4
332 - Financial economics
3
333 - Economics of land & energy
3
more ...