Classification
900 - History & geography
1,838
930 - History of ancient world to ca. 499
481
300 - Social sciences
387
700 - The arts; fine & decorative arts
205
320 - Political science
182
200 - Religion
173
140 - Specific philosophical schools
156
301 - Sociology & anthropology
148
800 - Literature & rhetoric
110
330 - Economics
102
100 - Philosophy & psychology
80
363 - Other social problems & services
77
000 - Computer science, information & general works
68
720 - Architecture
63
340 - Law
61
380 - Commerce, communications & transportation
60
304 - Factors affecting social behavior
50
333 - Economics of land & energy
46
400 - Language
42
576 - Genetics & evolution
42
620 - Engineering & allied operations
41
410 - Linguistics
40
610 - Medicine & health
34
370 - Education
30
551 - Geology, hydrology & meteorology
30
600 - Technology
30
560 - Paleontology; paleozoology
29
297 - Islam, Babism & Bahai Faith
28
500 - Natural sciences & mathematics
27
933 - Palestine to 70
26
780 - Music
21
936 - Europe north & west of Italy to ca. 499
21
170 - Ethics
20
520 - Astronomy & allied sciences
19
910 - Geography & travel
19
306 - Culture & institutions
18
590 - Animals (Zoology)
18
939 - Other parts of ancient world to ca. 640
18
550 - Earth sciences
16
630 - Agriculture & related technologies
15
540 - Chemistry & allied sciences
14
581 - Specific topics in natural history
14
307 - Communities
9
530 - Physics
9
791 - Public performances
9
364 - Criminology
8
120 - Epistemology, causation & humankind
7
160 - Logic
7
398 - Folklore
7
580 - Plants (Botany)
7
more ...