Classification
610 - Medicine & health
261
616 - Diseases
242
617 - Surgery & related medical specialties
241
700 - The arts; fine & decorative arts
117
615 - Pharmacology & therapeutics
82
600 - Technology
78
340 - Law
77
140 - Specific philosophical schools
55
330 - Economics
55
612 - Human physiology
53
000 - Computer science, information & general works
51
370 - Education
49
333 - Economics of land & energy
44
620 - Engineering & allied operations
44
320 - Political science
42
363 - Other social problems & services
38
900 - History & geography
36
580 - Plants (Botany)
31
380 - Commerce, communications & transportation
29
100 - Philosophy & psychology
20
500 - Natural sciences & mathematics
20
570 - Life sciences; biology
15
364 - Criminology
13
618 - Gynecology, obstetrics, pediatrics & geriatrics
13
150 - Psychology
10
400 - Language
10
613 - Personal health & safety
10
614 - Incidence & prevention of disease
9
658 - General management
9
780 - Music
9
540 - Chemistry & allied sciences
8
720 - Architecture
8
800 - Literature & rhetoric
8
300 - Social sciences
7
362 - Social welfare problems & services
7
576 - Genetics & evolution
7
629 - Other branches of engineering
7
170 - Ethics
6
551 - Geology, hydrology & meteorology
6
361 - Social problems & social welfare in general
5
571 - Physiology & related subjects
5
581 - Specific topics in natural history
5
630 - Agriculture & related technologies
5
360 - Social problems & services; associations
4
158 - Applied psychology
3
200 - Religion
3
410 - Linguistics
3
006 - Special computer methods
2
155 - Differential & developmental psychology
2
301 - Sociology & anthropology
2
more ...