Classification
620 - Engineering & allied operations
600 - Technology
71
900 - History & geography
60
700 - The arts; fine & decorative arts
55
000 - Computer science, information & general works
41
333 - Economics of land & energy
30
140 - Specific philosophical schools
25
610 - Medicine & health
19
363 - Other social problems & services
18
380 - Commerce, communications & transportation
15
576 - Genetics & evolution
15
580 - Plants (Botany)
13
330 - Economics
11
630 - Agriculture & related technologies
11
340 - Law
9
414 - Phonology & phonetics
9
500 - Natural sciences & mathematics
9
720 - Architecture
9
540 - Chemistry & allied sciences
8
370 - Education
7
551 - Geology, hydrology & meteorology
6
612 - Human physiology
5
300 - Social sciences
4
400 - Language
4
304 - Factors affecting social behavior
3
530 - Physics
3
581 - Specific topics in natural history
3
658 - General management
3
170 - Ethics
2
303 - Social processes
2
361 - Social problems & social welfare in general
2
780 - Music
2
005 - Computer programming, programs & data
1
297 - Islam, Babism & Bahai Faith
1
338 - Production
1
550 - Earth sciences
1
800 - Literature & rhetoric
1