Gairmuimhir
300 - Social sciences
639
900 - History & geography
75
600 - Technology (Applied sciences)
19
500 - Natural sciences and mathematics
15
800 - Literature (Belles-lettres) and rhetoric
15
700 - The arts
12
200 - Religion
10
400 - Language
6
100 - Philosophy & psychology
4
000 - Computer science, information, general works
2