Classification
900 - History & geography
264
700 - The arts; fine & decorative arts
201
610 - Medicine & health
185
330 - Economics
175
370 - Education
171
333 - Economics of land & energy
157
000 - Computer science, information & general works
140
600 - Technology
134
620 - Engineering & allied operations
129
320 - Political science
90
363 - Other social problems & services
89
140 - Specific philosophical schools
84
340 - Law
83
580 - Plants (Botany)
73
380 - Commerce, communications & transportation
70
500 - Natural sciences & mathematics
70
331 - Labor economics
66
004 - Data processing & computer science
62
100 - Philosophy & psychology
61
400 - Language
59
540 - Chemistry & allied sciences
48
780 - Music
47
658 - General management
40
576 - Genetics & evolution
35
342 - Constitutional & administrative law
30
300 - Social sciences
29
530 - Physics
29
200 - Religion
28
304 - Factors affecting social behavior
26
384 - Communications; telecommunication
26
630 - Agriculture & related technologies
26
800 - Literature & rhetoric
25
551 - Geology, hydrology & meteorology
24
005 - Computer programming, programs & data
23
346 - Private law
20
414 - Phonology & phonetics
20
720 - Architecture
17
345 - Criminal law
16
374 - Adult education
14
410 - Linguistics
14
612 - Human physiology
14
301 - Sociology & anthropology
11
581 - Specific topics in natural history
11
170 - Ethics
10
344 - Labor, social, education & cultural law
10
347 - Civil procedure & courts
10
361 - Social problems & social welfare in general
7
745 - Decorative arts
7
657 - Accounting
6
297 - Islam, Babism & Bahai Faith
5
more ...