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