Classification
600 - Technology
620 - Engineering & allied operations
363 - Other social problems & services
40
900 - History & geography
34
700 - The arts; fine & decorative arts
24
540 - Chemistry & allied sciences
20
333 - Economics of land & energy
12
500 - Natural sciences & mathematics
10
330 - Economics
9
000 - Computer science, information & general works
5
610 - Medicine & health
5
658 - General management
5
140 - Specific philosophical schools
4
380 - Commerce, communications & transportation
4
580 - Plants (Botany)
4
338 - Production
3
340 - Law
3
576 - Genetics & evolution
3
800 - Literature & rhetoric
3
004 - Data processing & computer science
2
005 - Computer programming, programs & data
2
331 - Labor economics
2
384 - Communications; telecommunication
2
720 - Architecture
2
304 - Factors affecting social behavior
1
400 - Language
1
414 - Phonology & phonetics
1
630 - Agriculture & related technologies
1
780 - Music
1