Classification
004 - Data processing & computer science
30
570 - Life sciences; biology
23
006 - Special computer methods
12
502 - Miscellany
9
005 - Computer programming, programs & data
8
541 - Physical chemistry
7
610 - Medicine & health
7
519 - Probabilities & applied mathematics
5
572 - Biochemistry
4
615 - Pharmacology & therapeutics
4
571 - Physiology & related subjects
3
577 - Ecology
3
660 - Chemical engineering
3
003 - Systems
2
333 - Economics of land & energy
2
353 - Specific fields of public administration
2
370 - Education
2
540 - Chemistry & allied sciences
2
580 - Plants (Botany)
2
612 - Human physiology
2
616 - Diseases
2
620 - Engineering & allied operations
2
621 - Applied physics
2
332 - Financial economics
1
518 - Numerical analysis
1
530 - Physics
1
547 - Organic chemistry
1
550 - Earth sciences
1
573 - Specific physiological systems in animals
1
576 - Genetics & evolution
1
629 - Other branches of engineering
1
630 - Agriculture & related technologies
1
631 - Techniques, equipment & materials
1
634 - Orchards, fruits & forestry
1