Classification
616 - Diseases
1,165
617 - Surgery & related medical specialties
841
610 - Medicine & health
125
615 - Pharmacology & therapeutics
111
620 - Engineering & allied operations
32
571 - Physiology & related subjects
22
612 - Human physiology
20
618 - Gynecology, obstetrics, pediatrics & geriatrics
20
700 - The arts; fine & decorative arts
18
611 - Human anatomy, cytology & histology
17
580 - Plants (Botany)
14
333 - Economics of land & energy
9
600 - Technology
9
006 - Special computer methods
7
140 - Specific philosophical schools
6
614 - Incidence & prevention of disease
6
000 - Computer science, information & general works
5
660 - Chemical engineering
5
363 - Other social problems & services
3
370 - Education
3
572 - Biochemistry
3
576 - Genetics & evolution
3
613 - Personal health & safety
3
304 - Factors affecting social behavior
2
320 - Political science
2
380 - Commerce, communications & transportation
2
540 - Chemistry & allied sciences
2
570 - Life sciences; biology
2
599 - Mammals
2
668 - Technology of other organic products
2
900 - History & geography
2
005 - Computer programming, programs & data
1
100 - Philosophy & psychology
1
150 - Psychology
1
301 - Sociology & anthropology
1
330 - Economics
1
344 - Labor, social, education & cultural law
1
414 - Phonology & phonetics
1
509 - Historical, geographic & persons treatment
1
530 - Physics
1
581 - Specific topics in natural history
1
629 - Other branches of engineering
1
630 - Agriculture & related technologies
1
636 - Animal husbandry
1
658 - General management
1
670 - Manufacturing
1
677 - Textiles
1