Classification
140 - Specific philosophical schools
2
330 - Economics
370 - Education
380 - Commerce, communications & transportation
2
410 - Linguistics
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
160 - Logic
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
600 - Technology
1
610 - Medicine & health
1