I love it that in U.K public libraries they used to (and still do, in fact) organise their shelves by the Dewey Decimal system , which put subjects in this order:

# 000 – Computer science, information, and general works
# 100 – Philosophy and psychology
# 200 – Religion
# 300 – Social sciences
# 400 – Languages
# 500 – Science and Mathematics
# 600 – Technology and applied science
# 700 – Arts and recreation
# 800 – Literature
# 900 – History and geography and biography,
[download]

and the 100's always seemed to attract the rather far out and wacky end of the spectrum.

I always thought it entertaining that books on programming ended up sharing a shelf with Erich_von_Daniken ;-)