Classification
160 - Logic
330 - Economics
2
363 - Other social problems & services
600 - Technology
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
333 - Economics of land & energy
1
370 - Education
1
380 - Commerce, communications & transportation
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
620 - Engineering & allied operations
1
658 - General management
1
800 - Literature & rhetoric
1