Source : Free On-Line Dictionary of Computing

thanks in advance
     
         (Usually "TIA") A conventional {Usenet}
        net.politeness ending a posted request for information or
        assistance.  Sometimes written "advTHANKSance" or
        "aTdHvAaNnKcSe".
     
        [{Jargon File}]
     
        (1999-02-09)