Classification
900 - History & geography
620
005 - Computer programming, programs & data
398
370 - Education
316
006 - Special computer methods
242
700 - The arts; fine & decorative arts
235
610 - Medicine & health
225
330 - Economics
140
745 - Decorative arts
140
320 - Political science
131
500 - Natural sciences & mathematics
121
000 - Computer science, information & general works
108
100 - Philosophy & psychology
95
140 - Specific philosophical schools
90
300 - Social sciences
90
800 - Literature & rhetoric
74
620 - Engineering & allied operations
67
340 - Law
60
331 - Labor economics
57
658 - General management
53
363 - Other social problems & services
52
576 - Genetics & evolution
51
380 - Commerce, communications & transportation
50
200 - Religion
46
004 - Data processing & computer science
42
600 - Technology
42
540 - Chemistry & allied sciences
41
333 - Economics of land & energy
40
400 - Language
37
301 - Sociology & anthropology
34
302 - Social interaction
29
720 - Architecture
29
170 - Ethics
28
362 - Social welfare problems & services
19
381 - Commerce
17
615 - Pharmacology & therapeutics
17
384 - Communications; telecommunication
16
780 - Music
16
616 - Diseases
15
410 - Linguistics
14
630 - Agriculture & related technologies
13
361 - Social problems & social welfare in general
11
530 - Physics
9
580 - Plants (Botany)
9
551 - Geology, hydrology & meteorology
8
830 - Literatures of Germanic languages
7
025 - Library operations
6
304 - Factors affecting social behavior
6
581 - Specific topics in natural history
6
297 - Islam, Babism & Bahai Faith
5
374 - Adult education
5
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