Choose Index below for a list of all words and phrases defined in this glossary.
Subclass - A subdivision of a mail class, usually based on the consideration of a physical characteristic rather than content.
[Category=Postal ]
Source: USPS, 01 November 2009 11:43:05, http://www.usps.com/cpim/ftp/pubs/pub32/pub32q_z.html
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