Classification
600 - Technology
65
620 - Engineering & allied operations
51
700 - The arts; fine & decorative arts
51
900 - History & geography
40
333 - Economics of land & energy
34
580 - Plants (Botany)
21
000 - Computer science, information & general works
20
540 - Chemistry & allied sciences
11
330 - Economics
9
363 - Other social problems & services
9
380 - Commerce, communications & transportation
8
610 - Medicine & health
8
414 - Phonology & phonetics
7
664 - Food technology
5
500 - Natural sciences & mathematics
4
304 - Factors affecting social behavior
3
576 - Genetics & evolution
3
668 - Technology of other organic products
3
140 - Specific philosophical schools
2
340 - Law
2
370 - Education
2
530 - Physics
2
621 - Applied physics
2
720 - Architecture
2
384 - Communications; telecommunication
1
551 - Geology, hydrology & meteorology
1
615 - Pharmacology & therapeutics
1
616 - Diseases
1
630 - Agriculture & related technologies
1
650 - Management & auxiliary services
1
660 - Chemical engineering
1
662 - Explosives, fuels & related products
1
800 - Literature & rhetoric
1