Classification
610 - Medicine & health
900 - History & geography
600 - Technology
237
620 - Engineering & allied operations
196
700 - The arts; fine & decorative arts
174
333 - Economics of land & energy
135
363 - Other social problems & services
81
330 - Economics
77
140 - Specific philosophical schools
74
320 - Political science
73
100 - Philosophy & psychology
66
000 - Computer science, information & general works
61
380 - Commerce, communications & transportation
55
300 - Social sciences
53
800 - Literature & rhetoric
49
580 - Plants (Botany)
45
370 - Education
43
200 - Religion
28
301 - Sociology & anthropology
25
500 - Natural sciences & mathematics
25
576 - Genetics & evolution
25
720 - Architecture
25
340 - Law
24
551 - Geology, hydrology & meteorology
21
170 - Ethics
19
630 - Agriculture & related technologies
19
400 - Language
14
581 - Specific topics in natural history
13
414 - Phonology & phonetics
12
540 - Chemistry & allied sciences
12
304 - Factors affecting social behavior
10
361 - Social problems & social welfare in general
10
297 - Islam, Babism & Bahai Faith
9
658 - General management
9
780 - Music
9
530 - Physics
8
362 - Social welfare problems & services
7
410 - Linguistics
7
615 - Pharmacology & therapeutics
7
612 - Human physiology
6
120 - Epistemology, causation & humankind
5
360 - Social problems & services; associations
4
616 - Diseases
4
791 - Public performances
4
350 - Public administration & military science
3
364 - Criminology
3
398 - Folklore
3
614 - Incidence & prevention of disease
3
232 - Jesus Christ & his family
2
550 - Earth sciences
2
more ...