Classification
600 - Technology
162
700 - The arts; fine & decorative arts
140
620 - Engineering & allied operations
126
333 - Economics of land & energy
110
900 - History & geography
106
000 - Computer science, information & general works
88
610 - Medicine & health
67
380 - Commerce, communications & transportation
63
140 - Specific philosophical schools
35
580 - Plants (Botany)
30
363 - Other social problems & services
29
512 - Algebra
29
330 - Economics
26
500 - Natural sciences & mathematics
21
540 - Chemistry & allied sciences
21
576 - Genetics & evolution
18
720 - Architecture
16
530 - Physics
14
414 - Phonology & phonetics
10
006 - Special computer methods
9
370 - Education
9
400 - Language
8
340 - Law
7
615 - Pharmacology & therapeutics
7
630 - Agriculture & related technologies
7
800 - Literature & rhetoric
7
320 - Political science
6
100 - Philosophy & psychology
5
304 - Factors affecting social behavior
5
510 - Mathematics
5
612 - Human physiology
5
621 - Applied physics
5
005 - Computer programming, programs & data
4
300 - Social sciences
3
551 - Geology, hydrology & meteorology
3
658 - General management
3
331 - Labor economics
2
384 - Communications; telecommunication
2
511 - General principles of mathematics
2
514 - Topology
2
550 - Earth sciences
2
570 - Life sciences; biology
2
745 - Decorative arts
2
781 - General principles & musical forms
2
170 - Ethics
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
338 - Production
1
410 - Linguistics
1
more ...