Classification
500 - Natural sciences & mathematics
900 - History & geography
15
610 - Medicine & health
3
700 - The arts; fine & decorative arts
3
320 - Political science
2
520 - Astronomy & allied sciences
2
600 - Technology
2
160 - Logic
1
300 - Social sciences
1
330 - Economics
1
340 - Law
1
380 - Commerce, communications & transportation
1
510 - Mathematics
1
511 - General principles of mathematics
1
612 - Human physiology
1
620 - Engineering & allied operations
1
800 - Literature & rhetoric
1
910 - Geography & travel
1