Classification
610 - Medicine & health
000 - Computer science, information & general works
585
700 - The arts; fine & decorative arts
439
600 - Technology
351
333 - Economics of land & energy
277
500 - Natural sciences & mathematics
229
620 - Engineering & allied operations
224
363 - Other social problems & services
220
580 - Plants (Botany)
215
140 - Specific philosophical schools
198
900 - History & geography
186
330 - Economics
151
540 - Chemistry & allied sciences
122
380 - Commerce, communications & transportation
113
630 - Agriculture & related technologies
84
300 - Social sciences
77
370 - Education
74
576 - Genetics & evolution
74
551 - Geology, hydrology & meteorology
67
320 - Political science
65
100 - Philosophy & psychology
61
612 - Human physiology
52
581 - Specific topics in natural history
48
658 - General management
48
615 - Pharmacology & therapeutics
47
800 - Literature & rhetoric
38
301 - Sociology & anthropology
31
304 - Factors affecting social behavior
30
361 - Social problems & social welfare in general
30
340 - Law
29
414 - Phonology & phonetics
29
720 - Architecture
29
170 - Ethics
20
530 - Physics
20
400 - Language
17
200 - Religion
14
410 - Linguistics
12
384 - Communications; telecommunication
6
590 - Animals (Zoology)
6
374 - Adult education
5
174 - Occupational ethics
4
364 - Criminology
4
519 - Probabilities & applied mathematics
4
780 - Music
4
791 - Public performances
4
297 - Islam, Babism & Bahai Faith
3
360 - Social problems & services; associations
3
550 - Earth sciences
3
398 - Folklore
2
770 - Photography, photographs & computer art
2
more ...