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Any librarian in a system using the DDC can tell you that the "Cutter Classification System" and the "Cutter number" are quite different things. The latter is the second line on the spine, below the Dewey class number and providing a letter-number code for the author's surname and the first letter (or letters) of the book title. Second & subsequent editions are also incorporated. The Cutter makes it much easier to shelve books in proper order. I'll write this up properly when I have the time, and then re-separate the "Cutter number" page, which currently redirects here. --Michael K. Smith02:46, 1 November 2006 (UTC)[reply]
There is some ambiguity in the current article due to the fact that the system developed by Cutter for the Boston Athenaeum is not the same as Cutter's better known Expansive Classification. If the classification used by the Boston Athenaeum is often referred to as the Cutter System then it might be best to avoid this phrase altogether to avoid confusion. I have already changed the text of the external links to reflect this distinction, but I thought I should open the idea to comment before making changes to main text of the page. Mr. Kalish (talk) 17:56, 5 October 2009 (UTC)[reply]