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