Classification
333 - Economics of land & energy
770 - Photography, photographs & computer art
000 - Computer science, information & general works
1
363 - Other social problems & services
1
550 - Earth sciences
1
600 - Technology
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1
791 - Public performances
1
800 - Literature & rhetoric
1
900 - History & geography
1