[W/K] :: sig block

  sig block /sig blok/ n. [Internet and Usenet; often written `.sig'
     there] Short for `signature', used specifically to refer to the
     electronic signature block that most Unix mail- and news-posting
     software will automagically append to outgoing mail and news. The
     composition of one's sig can be quite an art form, including an ASCII
     logo, one's choice of witty sayings (see sig quote, fool file), or
     even source code for small programs about which the author wishes to
     make a statement; but many consider large sigs a waste of bandwidth,
     and it has been observed that the size of one's sig block is usually
     inversely proportional to one's longevity and level of prestige on the
     net. See also doubled sig, McQuary limit.
  
  

  sig block
       
          /sig blok/ [Unix; often written ".sig" there].  See
          signature.
       
          [{Jargon File]