Classification
900 - History & geography
1,015
930 - History of ancient world to ca. 499
495
300 - Social sciences
300
700 - The arts; fine & decorative arts
167
301 - Sociology & anthropology
164
140 - Specific philosophical schools
131
200 - Religion
101
363 - Other social problems & services
96
320 - Political science
83
551 - Geology, hydrology & meteorology
74
720 - Architecture
66
620 - Engineering & allied operations
60
330 - Economics
57
304 - Factors affecting social behavior
55
800 - Literature & rhetoric
51
910 - Geography & travel
50
333 - Economics of land & energy
45
000 - Computer science, information & general works
43
500 - Natural sciences & mathematics
43
380 - Commerce, communications & transportation
41
600 - Technology
40
933 - Palestine to 70
40
100 - Philosophy & psychology
38
306 - Culture & institutions
38
340 - Law
35
560 - Paleontology; paleozoology
34
936 - Europe north & west of Italy to ca. 499
33
006 - Special computer methods
31
410 - Linguistics
31
004 - Data processing & computer science
28
005 - Computer programming, programs & data
28
520 - Astronomy & allied sciences
26
550 - Earth sciences
26
939 - Other parts of ancient world to ca. 640
26
540 - Chemistry & allied sciences
25
400 - Language
24
576 - Genetics & evolution
23
577 - Ecology
21
170 - Ethics
20
305 - Social groups
19
307 - Communities
18
530 - Physics
18
590 - Animals (Zoology)
18
630 - Agriculture & related technologies
18
581 - Specific topics in natural history
17
519 - Probabilities & applied mathematics
16
621 - Applied physics
14
937 - Italy & adjacent territories to 476
14
610 - Medicine & health
13
942 - England & Wales
13
more ...