Classification
600 - Technology
610 - Medicine & health
700 - The arts; fine & decorative arts
620 - Engineering & allied operations
176
333 - Economics of land & energy
132
900 - History & geography
130
000 - Computer science, information & general works
115
363 - Other social problems & services
96
140 - Specific philosophical schools
76
330 - Economics
65
580 - Plants (Botany)
62
380 - Commerce, communications & transportation
58
630 - Agriculture & related technologies
44
370 - Education
30
320 - Political science
25
551 - Geology, hydrology & meteorology
25
576 - Genetics & evolution
24
540 - Chemistry & allied sciences
22
720 - Architecture
21
414 - Phonology & phonetics
19
500 - Natural sciences & mathematics
19
658 - General management
18
340 - Law
16
800 - Literature & rhetoric
14
100 - Philosophy & psychology
13
400 - Language
13
612 - Human physiology
13
300 - Social sciences
11
170 - Ethics
9
304 - Factors affecting social behavior
9
581 - Specific topics in natural history
9
530 - Physics
7
615 - Pharmacology & therapeutics
7
410 - Linguistics
4
301 - Sociology & anthropology
3
350 - Public administration & military science
2
361 - Social problems & social welfare in general
2
780 - Music
2
200 - Religion
1
338 - Production
1
360 - Social problems & services; associations
1
520 - Astronomy & allied sciences
1
791 - Public performances
1