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   1<html><head><title>The Common Gateway Interface Specification
   2[http://hoohoo.ncsa.uiuc.edu/cgi/interface.html]
   3</title></head><body><h1><img alt="" src="interface_files/CGIlogo.gif"> The CGI Specification</h1>
   4
   5<hr>
   6
   7This is the specification for CGI version 1.1, or CGI/1.1. Further
   8revisions of this protocol are guaranteed to be backward compatible.
   9<p>
  10
  11The server and the CGI script communicate in four major ways. Each of
  12the following is a hotlink to graphic detail.</p><p>
  13
  14</p><ul>
  15<li> <a href="env.html">Environment variables</a>
  16</li><li> <a href="cl.html">The command line</a>
  17</li><li> <a href="in.html">Standard input</a>
  18</li><li> <a href="out.html">Standard output</a>
  19</li></ul>
  20<hr>
  21
  22
  23<a href="http://hoohoo.ncsa.uiuc.edu/cgi/overview.html"><img alt="[Back]" src="interface_files/back.gif">Return to the overview</a> <p>
  24
  25
  26
  27CGI - Common Gateway Interface
  28</p><address><a href="http://hoohoo.ncsa.uiuc.edu/cgi/mailtocgi.html">cgi@ncsa.uiuc.edu</a></address>
  29</body></html>
  30