Classification
900 - History & geography
371
800 - Literature & rhetoric
80
610 - Medicine & health
68
700 - The arts; fine & decorative arts
67
200 - Religion
66
330 - Economics
56
340 - Law
47
616 - Diseases
44
940 - History of Europe
40
300 - Social sciences
38
320 - Political science
36
809 - History, description & criticism
31
100 - Philosophy & psychology
27
140 - Specific philosophical schools
26
306 - Culture & institutions
22
410 - Linguistics
21
305 - Social groups
19
230 - Christianity & Christian theology
16
189 - Medieval western philosophy
14
271 - Religious orders in church history
14
400 - Language
14
370 - Education
13
658 - General management
13
720 - Architecture
13
304 - Factors affecting social behavior
12
510 - Mathematics
12
520 - Astronomy & allied sciences
12
941 - British Isles
12
004 - Data processing & computer science
11
282 - Roman Catholic Church
11
617 - Surgery & related medical specialties
11
000 - Computer science, information & general works
10
150 - Psychology
10
270 - History of Christianity & Christian church
10
909 - World history
10
930 - History of ancient world to ca. 499
10
942 - England & Wales
10
296 - Judaism
9
620 - Engineering & allied operations
9
780 - Music
9
005 - Computer programming, programs & data
8
333 - Economics of land & energy
8
621 - Applied physics
8
297 - Islam, Babism & Bahai Faith
7
301 - Sociology & anthropology
7
363 - Other social problems & services
7
380 - Commerce, communications & transportation
7
398 - Folklore
7
551 - Geology, hydrology & meteorology
7
612 - Human physiology
7
more ...