Source : Free On-Line Dictionary of Computing

Windows Hardware Quality Labs
     
         (WHQL) A {Microsoft} body that produces and
        supports the {Microsoft} {Hardware Compatibility Test} kit for
        current Microsoft {operating systems}.  Products are tested
        with the kit to ensure that they meet Microsoft standards for
        compatibility with {Windows} and to qualify to use the
        "Designed for Microsoft Windows" logos.
     
        {Home (http://www.microsoft.com/hwdq/hwtest/)}.
     
        (2002-11-13)