Classification
700 - The arts; fine & decorative arts
720 - Architecture
355
900 - History & geography
181
600 - Technology
105
333 - Economics of land & energy
92
620 - Engineering & allied operations
92
000 - Computer science, information & general works
78
363 - Other social problems & services
69
320 - Political science
54
330 - Economics
50
380 - Commerce, communications & transportation
50
140 - Specific philosophical schools
49
300 - Social sciences
39
610 - Medicine & health
35
370 - Education
31
576 - Genetics & evolution
25
800 - Literature & rhetoric
24
580 - Plants (Botany)
22
500 - Natural sciences & mathematics
21
200 - Religion
20
551 - Geology, hydrology & meteorology
20
100 - Philosophy & psychology
19
400 - Language
18
340 - Law
15
770 - Photography, photographs & computer art
13
301 - Sociology & anthropology
12
630 - Agriculture & related technologies
12
780 - Music
11
297 - Islam, Babism & Bahai Faith
9
581 - Specific topics in natural history
9
658 - General management
9
530 - Physics
8
414 - Phonology & phonetics
7
540 - Chemistry & allied sciences
7
410 - Linguistics
6
170 - Ethics
4
304 - Factors affecting social behavior
3
120 - Epistemology, causation & humankind
2
550 - Earth sciences
2
650 - Management & auxiliary services
2
005 - Computer programming, programs & data
1
111 - Ontology
1
160 - Logic
1
296 - Judaism
1
398 - Folklore
1
520 - Astronomy & allied sciences
1
612 - Human physiology
1
657 - Accounting
1
745 - Decorative arts
1
791 - Public performances
1
more ...