Classification
000 - Computer science, information & general works
620 - Engineering & allied operations
600 - Technology
19
900 - History & geography
18
700 - The arts; fine & decorative arts
15
333 - Economics of land & energy
8
610 - Medicine & health
7
330 - Economics
5
363 - Other social problems & services
5
380 - Commerce, communications & transportation
5
576 - Genetics & evolution
4
720 - Architecture
4
540 - Chemistry & allied sciences
3
781 - General principles & musical forms
3
140 - Specific philosophical schools
2
500 - Natural sciences & mathematics
2
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
331 - Labor economics
1
340 - Law
1
370 - Education
1
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
530 - Physics
1
770 - Photography, photographs & computer art
1
780 - Music
1