Classification
000 - Computer science, information & general works
3
410 - Linguistics
500 - Natural sciences & mathematics
600 - Technology
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
160 - Logic
1
330 - Economics
1
363 - Other social problems & services
1
370 - Education
1
530 - Physics
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
900 - History & geography
1