Classification
720 - Architecture
7
900 - History & geography
7
600 - Technology
3
620 - Engineering & allied operations
3
700 - The arts; fine & decorative arts
3
800 - Literature & rhetoric
3
380 - Commerce, communications & transportation
2
410 - Linguistics
2
000 - Computer science, information & general works
1
363 - Other social problems & services
1
370 - Education
1
540 - Chemistry & allied sciences
1
615 - Pharmacology & therapeutics
1