Classification
600 - Technology
620 - Engineering & allied operations
274
700 - The arts; fine & decorative arts
239
900 - History & geography
228
333 - Economics of land & energy
170
000 - Computer science, information & general works
108
363 - Other social problems & services
66
380 - Commerce, communications & transportation
65
580 - Plants (Botany)
65
330 - Economics
61
610 - Medicine & health
57
576 - Genetics & evolution
50
414 - Phonology & phonetics
38
140 - Specific philosophical schools
33
500 - Natural sciences & mathematics
27
720 - Architecture
26
340 - Law
24
540 - Chemistry & allied sciences
24
530 - Physics
18
630 - Agriculture & related technologies
15
551 - Geology, hydrology & meteorology
13
800 - Literature & rhetoric
12
320 - Political science
10
658 - General management
9
304 - Factors affecting social behavior
7
370 - Education
7
400 - Language
4
581 - Specific topics in natural history
4
410 - Linguistics
3
612 - Human physiology
3
650 - Management & auxiliary services
2
160 - Logic
1
300 - Social sciences
1
361 - Social problems & social welfare in general
1
550 - Earth sciences
1
657 - Accounting
1
770 - Photography, photographs & computer art
1