Source : Free On-Line Dictionary of Computing

uninstaller
     
         A {utility} program to remove another
        {application program} from a computer's disks.
     
        Most commonly found on {IBM PCs}, as applications tend to
        leave files in various places on the {hard disc}, so special
        software is required to tidy up after them.
     
        Ken Spreitzer  claims to have written the
        original PC program called "UnInstaller", first licensed to
        {MicroHelp} and now (Feb 1998) sold by {CyberMedia}.
     
        Compare with {installer}.
     
        (1998-02-09)