#missive__letter  a written message addressed to a person or organization; "wrote an indignant letter to the editor"
  supertype:  #textual_matter__textualmatter__text  the words of something written; "there were more than a thousand words of text"; "they handed out the printed text of the mayor's speech"; "he wants to reconstruct the original text"
  subtype:  #business_letter  #covering_letter  #crank_letter  #encyclical_letter  #personal_letter  #form_letter  #open_letter  #chain_letter  #pastoral.missive  #round_robin  #airmail_letter  #epistle  #dead_letter  #letter_of_intent
  part of:  #mail  #correspondence
  part:  #postscript__PS  a note appended to a letter after the signature
  part:  #name_and_address__address__addres  written directions for finding some location; written on letters or packages that are to be delivered to that location
     part:  #zip_code__zipcode__postal_code  a code of letters and digits added to a postal address to aid in the sorting of mail

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