csid

from The Free On-line Dictionary of Computing (8 July 2008)
character set identifier
CSID

   <character> (CSID) (IBM) A number that identifies a {character
   set}.

   (1995-03-21)
from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)
CSID
       Caller Station IDentification (Fax)
antiflux / dictionary / csid
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