Classification
600 - Technology
700 - The arts; fine & decorative arts
79
620 - Engineering & allied operations
78
900 - History & geography
70
333 - Economics of land & energy
60
610 - Medicine & health
43
000 - Computer science, information & general works
40
380 - Commerce, communications & transportation
29
363 - Other social problems & services
26
330 - Economics
25
140 - Specific philosophical schools
23
580 - Plants (Botany)
20
500 - Natural sciences & mathematics
14
370 - Education
12
320 - Political science
11
576 - Genetics & evolution
11
530 - Physics
10
540 - Chemistry & allied sciences
10
400 - Language
9
551 - Geology, hydrology & meteorology
9
630 - Agriculture & related technologies
8
720 - Architecture
8
414 - Phonology & phonetics
7
658 - General management
6
340 - Law
5
800 - Literature & rhetoric
5
581 - Specific topics in natural history
4
100 - Philosophy & psychology
3
410 - Linguistics
3
550 - Earth sciences
3
612 - Human physiology
3
304 - Factors affecting social behavior
2
615 - Pharmacology & therapeutics
2
770 - Photography, photographs & computer art
2
170 - Ethics
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
780 - Music
1