Classification
620 - Engineering & allied operations
600 - Technology
63
363 - Other social problems & services
35
333 - Economics of land & energy
34
700 - The arts; fine & decorative arts
32
630 - Agriculture & related technologies
23
330 - Economics
22
658 - General management
17
000 - Computer science, information & general works
15
380 - Commerce, communications & transportation
15
005 - Computer programming, programs & data
14
610 - Medicine & health
14
320 - Political science
13
500 - Natural sciences & mathematics
12
900 - History & geography
9
300 - Social sciences
8
540 - Chemistry & allied sciences
8
140 - Specific philosophical schools
7
370 - Education
7
551 - Geology, hydrology & meteorology
7
006 - Special computer methods
5
100 - Philosophy & psychology
5
170 - Ethics
5
340 - Law
5
621 - Applied physics
5
720 - Architecture
5
301 - Sociology & anthropology
4
338 - Production
4
400 - Language
4
530 - Physics
4
581 - Specific topics in natural history
4
331 - Labor economics
3
576 - Genetics & evolution
3
580 - Plants (Botany)
3
153 - Mental processes & intelligence
2
200 - Religion
2
297 - Islam, Babism & Bahai Faith
2
602 - Miscellany
2
800 - Literature & rhetoric
2
001 - Knowledge
1
004 - Data processing & computer science
1
160 - Logic
1
303 - Social processes
1
332 - Financial economics
1
368 - Insurance
1
410 - Linguistics
1
414 - Phonology & phonetics
1
510 - Mathematics
1
612 - Human physiology
1
616 - Diseases
1
more ...