Classification
900 - History & geography
600 - Technology
1,949
700 - The arts; fine & decorative arts
1,921
620 - Engineering & allied operations
1,808
800 - Literature & rhetoric
1,154
320 - Political science
976
333 - Economics of land & energy
898
300 - Social sciences
712
330 - Economics
632
100 - Philosophy & psychology
610
200 - Religion
567
140 - Specific philosophical schools
564
363 - Other social problems & services
557
000 - Computer science, information & general works
501
380 - Commerce, communications & transportation
494
610 - Medicine & health
451
400 - Language
405
410 - Linguistics
404
370 - Education
372
340 - Law
353
720 - Architecture
269
301 - Sociology & anthropology
261
576 - Genetics & evolution
247
580 - Plants (Botany)
212
780 - Music
182
500 - Natural sciences & mathematics
175
304 - Factors affecting social behavior
155
551 - Geology, hydrology & meteorology
132
170 - Ethics
121
414 - Phonology & phonetics
116
630 - Agriculture & related technologies
109
297 - Islam, Babism & Bahai Faith
106
530 - Physics
96
581 - Specific topics in natural history
92
540 - Chemistry & allied sciences
84
770 - Photography, photographs & computer art
65
658 - General management
59
791 - Public performances
49
296 - Judaism
48
120 - Epistemology, causation & humankind
47
361 - Social problems & social welfare in general
35
398 - Folklore
32
520 - Astronomy & allied sciences
19
612 - Human physiology
16
590 - Animals (Zoology)
15
160 - Logic
14
350 - Public administration & military science
14
550 - Earth sciences
13
657 - Accounting
13
360 - Social problems & services; associations
11
more ...