资料来源 : Free On-Line Dictionary of Computing

Gopher object type
     
        A character specifying how to display a {Gopher} document.
        Current types are:
     
         0  document
         1  menu
         2  CSO phone book entity
         3  error
         4  binhex binary
         5  DOS binary (deprecated)
         6  UU  binary (deprecated)
         7  index search
         8  telnet connection
         9  binary
         +  duplicate server for previous object
         I  image
         M  MIME document
         T  tn3270 based telnet connection
         c  cal
         g  GIF image
         h  HTML
         s  binary
         u  {Usenet} newsgroup
     
        (1999-10-14)