At a point halfway through this institute and at the commencement of the second evening session, I am appalled at the problem of making my contribution intellectually stimulating as well as entertaining. I cannot regard my paper as something other than a watershed. Earlier ones have stressed the history of the Dewey Decimal Classification (DDC) and its place in the North American scene, while I have been invited to survey somewhat wider horizons (with apologies to the North American continent) in the shape of British use and influence, with what I trust will be a suitable appendix on the European scene. My own direct involvement with DDC is relatively recent, although I have a professional relationship which goes back to the twelf...