Classification
414 - Phonology & phonetics
900 - History & geography
600 - Technology
64
620 - Engineering & allied operations
62
700 - The arts; fine & decorative arts
48
333 - Economics of land & energy
35
000 - Computer science, information & general works
23
363 - Other social problems & services
22
580 - Plants (Botany)
16
576 - Genetics & evolution
15
400 - Language
13
610 - Medicine & health
12
380 - Commerce, communications & transportation
11
410 - Linguistics
11
551 - Geology, hydrology & meteorology
11
330 - Economics
10
340 - Law
9
140 - Specific philosophical schools
7
500 - Natural sciences & mathematics
6
581 - Specific topics in natural history
6
320 - Political science
5
800 - Literature & rhetoric
5
304 - Factors affecting social behavior
4
370 - Education
3
530 - Physics
3
540 - Chemistry & allied sciences
3
301 - Sociology & anthropology
2
100 - Philosophy & psychology
1
170 - Ethics
1
361 - Social problems & social welfare in general
1
491 - East Indo-European & Celtic languages
1
550 - Earth sciences
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
630 - Agriculture & related technologies
1
720 - Architecture
1
770 - Photography, photographs & computer art
1