Classification
330 - Economics
333 - Economics of land & energy
500 - Natural sciences & mathematics
576 - Genetics & evolution
600 - Technology
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
900 - History & geography
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
340 - Law
1
380 - Commerce, communications & transportation
1
610 - Medicine & health
1