Classification
576 - Genetics & evolution
600 - Technology
900 - History & geography
363 - Other social problems & services
2
370 - Education
2
380 - Commerce, communications & transportation
2
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
320 - Political science
1
333 - Economics of land & energy
1
400 - Language
1
410 - Linguistics
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1
658 - General management
1