Classification
700 - The arts; fine & decorative arts
600 - Technology
64
000 - Computer science, information & general works
62
620 - Engineering & allied operations
59
333 - Economics of land & energy
58
900 - History & geography
54
610 - Medicine & health
46
330 - Economics
32
363 - Other social problems & services
27
580 - Plants (Botany)
27
380 - Commerce, communications & transportation
22
140 - Specific philosophical schools
20
576 - Genetics & evolution
20
540 - Chemistry & allied sciences
19
500 - Natural sciences & mathematics
12
551 - Geology, hydrology & meteorology
11
720 - Architecture
11
414 - Phonology & phonetics
10
658 - General management
10
001 - Knowledge
9
370 - Education
9
100 - Philosophy & psychology
8
300 - Social sciences
8
530 - Physics
8
630 - Agriculture & related technologies
6
005 - Computer programming, programs & data
5
320 - Political science
5
581 - Specific topics in natural history
5
612 - Human physiology
5
301 - Sociology & anthropology
4
400 - Language
4
338 - Production
3
800 - Literature & rhetoric
3
006 - Special computer methods
2
304 - Factors affecting social behavior
2
306 - Culture & institutions
2
331 - Labor economics
2
340 - Law
2
384 - Communications; telecommunication
2
615 - Pharmacology & therapeutics
2
657 - Accounting
2
153 - Mental processes & intelligence
1
297 - Islam, Babism & Bahai Faith
1
332 - Financial economics
1
353 - Specific fields of public administration
1
362 - Social welfare problems & services
1
374 - Adult education
1
381 - Commerce
1
410 - Linguistics
1
510 - Mathematics
1
more ...