Classification
330 - Economics
500 - Natural sciences & mathematics
576 - Genetics & evolution
600 - Technology
620 - Engineering & allied operations
4
700 - The arts; fine & decorative arts
900 - History & geography
333 - Economics of land & energy
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
300 - Social sciences
1
340 - Law
1
370 - Education
1
380 - Commerce, communications & transportation
1
530 - Physics
1
540 - Chemistry & allied sciences
1
610 - Medicine & health
1
658 - General management
1
720 - Architecture
1