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